During World War II, the demand for aluminum increased dramatically as it was used for military aircraft, tanks, and other equipment. This led to the development of aluminum alloys, which are mixtures of aluminum with other metals such as copper, zinc, and magnesium. Aluminum alloys have improved mechanical properties such as strength, hardness, and corrosion resistance, which made them ideal for military applications.
After the war, the use of aluminum alloys continued to grow in various industries, including aerospace, automotive, and construction. Aluminum alloys were used for aircraft frames, engine components, car bodies, and building facades, among other applications. The demand for aluminum alloys led to the development of new manufacturing processes and technologies, such as extrusion, casting, and rolling.