Alcoa Corporation operates as a vertically integrated aluminum company, engaging in bauxite mining, alumina refining, aluminum production, and power generation. Its Alumina segment processes bauxite into alumina for both internal and external customers, while the Aluminum segment transforms alumina into primary aluminum through a global smelting and foundry system. The company also manages the Alcoa World Alumina and Chemicals joint venture, which oversees various bauxite mines and alumina refineries.