Metal materials account for 80% of regular weapons, of which steel materials account for the main position. However, with the modernization of weapons, the role of high-performance non-ferrous metal armor materials, structural special functional materials and composite materials is increasing. The use of aluminum alloy armored body materials has gone through four stages of development, from high-toughness weldable Al-Mg alloy armor to aluminum alloy gap laminated armor and aluminum alloy armor additional composite armor. Carbon fiber-copper composites and carbon fiber-lead composites are also widely used in various fields due to their respective characteristics. In addition, the innovative application of light metal materials and the development of lightweight industry, the application and development prospects of light alloy components in rail transit, and the surface modification and functionalization of biomedical materials have also attracted much attention.