1. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
2. Shaanxi TianCheng Aerospace Co., Ltd., Xianyang 712000, China
The growing demand for lightweight, high-strength titanium alloys in advanced applications such as warhead casings and armored protection has intensified the challenges in titanium alloys extreme service performance under high strain rates (102~104 s-1) and intense impact loading. This review systematically examines the dynamic mechanical response and deformation characteristics of titanium alloys subjected to loading at high strain rate, highlighting significant differences in macroscopic mechanical properties and microstructural evolution compared to quasi-static conditions. Studies indicate that titanium alloys universally exhibit pronounced strain rate strengthening effects when being deformed at high strain rate. Intense adiabatic temperature rise induces thermal softening, triggering the formation of adiabatic shear band （ASB）, which serve as critical precursors to dynamic failure. ASBs typically consist of randomly oriented equiaxed nanograins, though their formation mechanisms remain contentious, primarily being divided between discontinuous dynamic recrystallization (DDRX) and continuous dynamic recrystallization (CDRX) theories. Furthermore, β-type titanium alloys often demonstrate complex coupling of multiple mechanisms during high-velocity deformation, including dislocation slip, twinning and stress-induced phase transformations. The interaction among these mechanisms require further elucidation. By summarizing recent global research progress in this field, this review aims to establish a theoretical foundation and provide reference insights for understanding the mechanical response and plastic deformation behavior of titanium alloys under extreme dynamic loading.