Ternium Completes Acquisition of Participation in Usiminas Control Group

Luxembourg, January 17, 2012 –Ternium S.A. (NYSE: TX) announced today that, together with its Argentine subsidiary Siderar and Confab Industrial S.A., a subsidiary of Tenaris S.A. (“TenarisConfab”), it completed the previously announced acquisition of 139.7 million ordinary shares of Usinas Siderúrgicas de Minas Gerais S.A. – USIMINAS (“Usiminas”) from Camargo Corrêa, Votorantim and Caixa dos Empregados da Usiminas (Usiminas’ employee pension fund – “CEU”), or 27.7% of the voting capital, at a price of BRL36 per ordinary share (approximately USD19). Ternium and Siderar financed their BRL4.1 billion share (approximately USD2.2 billion) with cash on hand and, in the case of Ternium, a USD700 million syndicated term loan.

Following the closing of the transaction, Messrs. Daniel Novegil, Roberto Vidigal and Alcides Morgante were appointed as members of Usiminas' board of directors, together with their alternates, to replace the board members nominated by Camargo Correa and Votorantim. In addition, Usiminas’ board of directors appointed Julián Eguren, previously a senior executive with Ternium, as chief executive officer (Diretor-Presidente) of Usiminas.

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 USD7.4 billion).

About Ternium

Ternium is a leading steel company in Latin America, manufacturing and processing a wide range of flat and long steel products for customers active in the construction, home appliances, capital goods, container, food, energy and automotive industries. With its principal operations in Mexico and Argentina, Ternium serves markets in the Americas through its integrated manufacturing system and extensive distribution network. The Company has an annual production capacity of approximately ten million tons of finished steel products