Abstract:The aluminum-lithium (Al-Li) alloys, which are characterized with lower density, higher specific strength and better corrosion resistance as compared with conventional aluminum alloys, had been widely applied in the fields of aviation, aerospace and navigation. A1-Li alloys exceptional properties are attributed to the addition of Li into the Al matrix. However, A1-Li alloys have problems such as poor formability, large rebound, and anisotropy at room temperature, which severely limit their applications. While the formability of Al-Li alloys could be effectively improved by heating. Schlors had made a lot of research on the hot forming process of Al Li alloys. This paper firstly, introduced the development of Al Li alloys and the research process on thermal formability of Al?Li Alloys based on experiments, instablity criterion and damage theory; aiming at obtained the macro and micro deformation mechanism and damage evolution law of Al Li alloys at high temperature. Additionally, thermal forming and ageing hardening of the Al-Li alloys would be integrated together to approach the target of shape forming and properties improvement of the parts. Finally, the development direction of thermal formability of Al?Li Alloys for aeronautic industry was prospected. This paper can provide a theoretical guidance for the application of the Al-Li alloys thermal forming process.