Investor Presentation November 2018 As of November 22, 2018

Forward-Looking Statements This presentation contains certain forward-looking statements and information relating to Ternium S.A. and its subsidiaries (collectively, “Ternium”) that are based on the current beliefs of its management as well as assumptions made by and information currently available to Ternium. Such statements reflect the current views of Ternium with respect to future events and are subject to certain risks, uncertainties and assumptions. Many factors could cause the actual results, performance or achievements of Ternium to be materially different from any future results, performance or achievements that may be expressed or implied by such forward-looking statements, including, among others, changes in general economic, political conditions in the countries in which Ternium does business or other countries which have an impact on Ternium’s business activities and investments, changes in interest rates, changes in inflation rates, changes in exchange rates, the degree of growth and the number of consumers in the markets in which Ternium operates and sells its products, changes in steel demand and prices, changes in raw material and energy prices or difficulties in acquiring raw materials or energy supply cut-offs, changes in business strategy and various other factors. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those described herein as anticipated, believed, estimated, expected or targeted. Ternium does not intend, and does not assume any obligation, to update these forward-looking statements.

Profile and Performance

Ternium’s Profile A leading steel company in Latin America Net sales of USD 9.7 billion in 2017 Crude steel capacity of 12.4 million tons Industrial facilities in Mexico, Argentina, Brazil, Colombia, USA and Central America Vertically integrated, from iron ore mines to service centers Focus on high value-added products Participation in Usiminas1 control group 1 Usiminas: a leading company in the Brazilian flat steel market

EBITDA Margin (% of net sales) Ternium’s Profile Consistently superior results 1 Long steel Americas, global player, U.S. minimill and U.S. integrated (Source: Bloomberg) Average EBITDA Margin (% of net sales) Ternium Peers range1 Focus on high margin value-added products Flexible production configuration Diversified cost structure Upstream and downstream integration Best practices Broad distribution network Recruitment and retention of talent Innovative culture, industrial expertise and long-term view 9M18 1H18

Performance Sustainable growth and resilient profitability Steel shipments (million tons) EBITDA (USD million) Free cash flow (USD million) Capital Expenditures (USD million)

Performance Solid financial position Strong balance sheet Net debt to EBITDA ratio of 0.8x at the end of September 2018 USD1.5 billion five-year syndicated term loan facility to finance CSA acquisition in September 2017 Growing dividend payments USD1.1 per ADS for 2017, 47% increase since 2013 4% dividend yield in 20172 Net Debt (USD billion) 1 1.2x 1.1x 0.6x 1.4x 0.8x1 Annual dividends (USD per ADS) 1 Net Debt/EBITDA Ratio (last 12 months EBITDA) 2 Dividend yield: Dividend / Average stock price (Source: Bloomberg)

Performance Quarterly EBITDA and net income EBITDA Margin (% of net sales) EBITDA per ton1 (USD) 1 Consolidated EBITDA divided by steel shipments.

Performance Continuous focus on profitability Breakthrough initiatives to increase differentiation and reduce costs Customer integration Labor productivity Exiros Working capital optimization Logistics management Contractors management Energy efficiency Continuous improvement

Latin American Steel Markets

Latin American Steel Markets Mexico became the largest steel market in the region Mexico, Brazil, Argentina and Colombia account for approximately 80% of Latin America’s steel consumption Mexico’s steel consumption CAGR of 6.0% in the last decade, among the highest in the region, driven by a dynamic manufacturing industry Apparent steel use (million tons) 2018f 2018f Source: Wordlsteel SRO Oct’18 - Canacero, Aço Brasil, Cámara Argentina del Acero, ANDI

Mexico

Ternium’s Markets - Mexico Shipments to industrial customers growing consistently Most attractive steel market in Latin America 50% increase in flat steel consumption since 2011 Opportunity to substitute imports of high- end products Industrial market increasing relevance NAFTA renegotiated successfully Section 232 still pending Safeguard in Mexico renewed Apparent flat steel use – Mexico (million tons) Apparent flat steel use – Mexico (% share) Source: Alacero / Ternium estimates

Ternium’s Markets - Mexico Strong industrial steel demand Light vehicle production is expected to continue growing Production in 2017 increased by 12% reaching 3.9 million units New OEM capacity added during 2017 Construction: Weak environment as a result of decreasing government spending Private activity offset decrease in government investment over the last years Light vehicle production (million units) Construction spending (billion of constant MXN) Source: AMIA / Global Insights / INEGI

Ternium’s Markets - Mexico Strong growth of Ternium’s shipments Ternium shipments in Mexico consistently growing 200,000-ton shipment increase in 2017 Broader product range enabled by upgrading of re-rolling facility in 2017 Differentiation in the commercial market through value-added products and services Increasing customer digital connectivity Nationwide coverage through distribution centers and regional distributors Ternium steel shipments in Mexico (million tons) +4% 45% 58% 55% 42% Ternium’s steel shipments by industry (2017)

Southern Region - Argentina

Apparent flat steel use – Argentina Ternium’s Markets - Argentina Decreased flat steel consumption expected in 2018 Flat steel use in Argentina revised down in 2018 Agribusiness sector affected by adverse weather conditions (grain production down 18% y-o-y in 2017/18) Significant volatility in local financial markets High interest rates Public infrastructure investments decelerating Decreased local demand for vehicles and home appliances Apparent flat steel use – Argentina (million tons) -5% Source: Alacero / Ternium estimates

Ternium’s Markets - Argentina Positive outlook for agribusiness and energy Agribusiness sector recovery Record acreage sown for the coming season Projected grain production +24% y-o-y Development of the Vaca Muerta shale formation Natural gas production rates accelerating Announced investments over $12 billion Construction sector Expected decline in government spending in infrastructure that could be offset by kick-off of Private-Public Projects (PPP) Renewable energy projects Approved projects account for 13% of Argentina’s electricity generation capacity Grain production – Argentina (million tons) Shale gas production – Argentina (million m3/day) Source: Ministerio de Agroindustria / G&G Energy Consultants /Ternium estimates

Developing Ternium’s industrial system

Ternium Brasil Strong foundation to continue growing New 5 mtpy high-end slab facility in Brazil Further integrate Ternium Brasil to take it to its full potential Increase competitiveness in the high-end Mexican steel market vis-à-vis imports Improve customer service supported by higher operational flexibility Customized steel products Coordinated product development Enhanced logistics Realize cost reduction opportunities Coordinated procurement effort (Exiros) IT integration Inventory optimization Benchmarking

New Hot Rolling Mill at Pesquería Industrial Center A logical step after the addition of Ternium Brasil Significant technological upgrade to expand TX’s product range in Mexico Aimed at replacing high value-added steel imports and improving customer service Targeting the automotive industry, as well as the home appliance, machinery, energy and construction sectors Annual production capacity of 4.1 million tons (option to increase capacity to 4.8 million tons) Expected start up: end of 2020 Total investment of USD1.1 billion

New Coating Lines at Pesquería Industrial Center Opportunity to grow in the high-end Mexican market New hot-dipped galvanizing and painting lines High-end value-added products for the home-appliance, heating-ventilation-air conditioning (HVAC) and automotive industries Most advanced painting technology in Mexico Annual production capacity: Galvanizing: 350,000 tons Painting: 120,000 tons Expected start up: Galvanizing: May 2019 Painting: March 2019 Total investment of USD280 million

Apparent long steel use Colombia Growth opportunity in the long steel market Colombian steel market is the fourth largest in Latin America Imports account for a significant share of long steel consumption Ternium to expand its participation in the construction sector in the north/northwest of Colombia Approximately 50% of steel rebar consumption No local production Expensive logistics from the mills in central Colombia Greenfield rebar facility under construction Annual capacity of 520,000 tons Start up: end of 2019 Total investment of $90 million Apparent long steel use (million tons)

Conclusion

Conclusion Consistently superior results in attractive steel markets in Latin America Solid financial position and strong dividend payments Successful implementation of business strategy geared toward sustainable profitable growth TX Brasil integration and new investment program provide opportunity to grow and strengthen business in the region Continued focus on generating long-term shareholder value

Appendix Corporate Structure Production Capacity CSA Acquisition Shipments and Net Sales Income Statement Cash Flow Statement Balance Sheet Webcast Presentation Third Quarter 2018

Corporate Structure 71% Ternium México Las Encinas Peña Colorada 29% Techint Group: 62% Tenaris: 11% Ternium (treasury shares): 2% Public: 24% Subsidiaries Joint operations Non-consolidated companies 71% Ternium México 100% 50% Las Encinas Peña Colorada 29% 61% Ternium Argentina4 39% Other 50% 6%1 ArcelorMittal 28%1 CEU: 5%1 Nippon Steel & Sumitomo Metal: 32%1 TenarisConfab: 5%1 Other (ordinary shares): 23%1 Usiminas Economic participation 100% Ternium Brasil5 51% Tenigal 49% Nippon Steel & Sumitomo Metal 100% Ternium Colombia 100% Ternium USA 100% Ternium Int. Guatemala 48% Techgen 30% Tecpetrol 22% 1 Participation based on ordinary shares distributed 2 Participation based on total shares distributed 3 Net of non-controlling interest in TX Argentina 4 Formerly known as Siderar 5 Formerly known as CSA 50% Exiros 50% Tenaris

Production Capacity (2) (1) Brazil, Southern US, Colombia and Central America (2) Corresponds to Ternium Brasil

CSA Acquisition The Transaction On Sep 7, 2017 Ternium acquired thyssenkrupp Slab International B.V. (tkSI) and its wholly-owned subsidiary CSA Siderúrgica do Atlântico Ltda. from thyssenkrupp AG (tkAG) In addition, tkAG assigned to Ternium an agreement to supply slabs to thyssenkrupp’s former Calvert re-rolling facility in the U.S. (amended in Dec17) Ternium disbursed EUR1.4 billion on a cash-free, debt-free basis, for the acquisition of both the tkSI shares and the slab supply agreement The transaction was financed with a five-year syndicated term loan facility in a principal amount of USD1.5 billion Ternium began consolidating tkSI’s balance sheet and results of operations in its consolidated financial statements in Sep17 Upon closing, CSA name was changed to Ternium Brasil

CSA Acquisition The Assets CSA is a Brazilian state-of-the-art steel slab producer 5 mtpy capacity of high-grade steel slabs 490 MW combined cycle power plant Deep-water harbor Compact, efficient and environmentally friendly facility Just-in-time iron ore supply (railroad) Daniel Novegil, Ternium’s CEO at the time said: “This acquisition brings another state-of- the-art facility into Ternium’s industrial system, along with CSA’s highly-skilled personnel and know-how, thereby enhancing our differentiation and value-added capabilities in the steel production supply chain. Upon integration, Ternium customers will not only benefit from our expanded high-end steel slabs capacity, but also see the results of an enhanced product development and supply chain management effort that will increase our high-end steel specialization in Mexico and Argentina. We move forward as a strengthened organization across our strategic industrial sectors in Latin America.”

Shipments and Net Sales Third Quarter 2018 and Nine Months 2018

Shipments and Net Sales Full year 2017 and 2016

Income Statement

Cash Flow Statement

Balance Sheet

3Q18 Results – Webcast Presentation Steel shipments Total Shipments (thousand tons) Mexico (thousand tons) Southern Region (thousand tons) Other Markets (thousand tons) Other Markets 34%

3Q18 and First Nine Months 2018 Results EBITDA and Net Results 3Q18 (million USD) 9M18 (USD million) Equity in Earnins of non-consolidated companies 9M18 (million USD) Equity in Earnins of non-consolidated companies

Dividends Payments (USD per ADS) 3Q18 and First Nine Months 2018 Results Free Cash Flow, Net Financial Debt and Dividends Net Debt (USD billion) Dividends Payments (USD per ADS) 1.2x 1.1x 0.6x 1.4x 0.8x1 1 Net Debt/EBITDA Ratio (last 12 months EBITDA)