Allegheny Technologies Incorporated (ATI) is a specialty metals company headquartered in Pittsburgh, Pennsylvania. ATI produces titanium and titanium alloys, nickel-based alloys and superalloys, grain-oriented electrical steel, stainless and specialty steels, zirconium, hafnium, and niobium, tungsten materials, forgings and castings. The company's products are used in various markets, including aerospace and defense, oil and gas, chemical process, and electrical energy. ATI has operations in North America, Europe, and Asia.