**1. Introduction and Scope**

With the rapid development of aviation, aerospace, navigation, automotive, electronics and other fields, the demand for light alloys components is increasing, and the performance requirements are becoming higher and higher, especially for large complex light alloys components. Therefore, high performance light alloys will have a great application potential in the future. The casting and forming of light alloys is an important step to obtain large and complex light alloy components with a high performance. Together with the compositions of light alloys, they determine the formability, defects, microstructure and mechanical properties of light alloys.

This Special Issue aims to present the latest developments in the casting and forming of light alloys. The preparation process and performance enhancement of Al, Mg or their composite materials are mainly studied. Particular attention has been paid to the relationship between process conditions, microstructural features and mechanical properties.
