Ternium to Acquire Participation in Usiminas Control Group

Luxembourg, November 27, 2011 –Ternium S.A. (NYSE: TX) announced today that it has entered into share purchase agreements with Camargo Corrêa, Votorantim and Caixa dos Empregados Usiminas (Usiminas employees’ pension fund – “CEU”), pursuant to which it expects to acquire, together with its Argentine subsidiary Siderar and Confab Industrial S.A., a subsidiary of Tenaris S.A. (“TenarisConfab”), 139.7 million ordinary shares of Usinas Siderúrgicas de Minas Gerais S.A. – USIMINAS (“Usiminas”), or 27.7% of the voting capital, at a price of BRL36 per ordinary share (approximately USD19.0), which represents a premium of approximately 41% to Usiminas’ ordinary share last-six-months average U.S. dollar price. Ternium and Siderar will finance their BRL4.1 billion share (approximately USD2.2 billion) with cash on hand and debt.

Ternium, Siderar and TenarisConfab will join Usiminas’ existing control group through the acquisition of 84.7, 30.0, and 25.0 million ordinary shares, respectively. In addition, Nippon Steel will acquire from CEU 8.5 million ordinary shares. As a result of these transactions, the control group, which holds 322.7 million ordinary shares representing the majority of Usiminas’ voting rights, will be formed as follows: Nippon Group 46.1%, Ternium/Tenaris Group 43.3%, and CEU 10.6%.

In addition, Ternium entered into an amended and restated Usiminas shareholders’ agreement with Nippon Steel, Mitsubishi, Metal One and CEU, governing Ternium, Siderar and TenarisConfab’s rights within the control group. Most decisions in that group are subject for its approval to a 65% majority of the control group shares.

With strategically located facilities near the main consumers of steel in Brazil and iron ore mines in the Serra Azul region, Usiminas is the largest flat steel producer in the country, with 9.5 million tons of crude steel capacity, and the leader in the Brazilian flat steel market. Usiminas is organized under four main business units: Mining, Steel, Steel Processing and Capital Goods. In 2010, Usiminas had net sales of BRL13.0 billion (approximately USD6.9 billion).

These transactions seal a strategic alliance in Latin America among Nippon Steel, Usiminas and Ternium that will create value for all companies involved. With Nippon Steel, Usiminas and Ternium working together, we will be able to enhance each company’s competitiveness in technology, quality and cost efficiency and to offer a wider product range that will focus on supplying the most sophisticated products throughout the region, from Mexico to Argentina. Furthermore, our combined strengths will enable us to capitalize on upstream and downstream integration opportunities and to increase the bargaining power of our procurement activities. Ternium and Siderar will also benefit from an increased access to the Brazilian steel market which, with a steel consumption of 26 million tons per year, is the biggest market in the region and is expected to grow significantly in the years to come. Finally, with the support of TenarisConfab, Usiminas, Ternium and Nippon Steel will be better positioned to profit from the development of infrastructure and energy projects in Brazil.

These transactions are subject to customary conditions and applicable corporate approvals by the Nippon Group. Closing is expected to occur in January 2012.