The plastic deformation of the material is called dynamic plastic deformation when the strain rate is higher than 102 s-1. In comparison with quasi-static plastic deformation, the dynamic plastic deformation involves highly localized deformation and more complex mechanisms which can have a significant impact on the properties and life of materials. As a special deformation structure in the process of dynamic plastic deformation, adiabatic shear band has attracted great attention because of its influence on material properties. Because of its excellent mechanical properties, titanium alloy is widely used in many industries as structural material. Because of its wide application, titanium alloy will often face failure caused by adiabatic shear band formation in dynamic load, so as to reduce and shorten the service life. Therefore, the study on the formation mechanism of adiaba-tic shear band in titanium alloy is of great significance to prolong the service life of titanium alloy and improve the mechanical properties of titanium alloy. However, due to the transient of dynamic plastic deformation and the complexity of internal stress, it is difficult to reappear the formation of adiabatic shear band. Meanwhile the complexity of the structure and the instability of phase in the process of deformation increase the difficulty of observing the adiabatic shear band in titanium alloy. Through a large number of experimental observation and simulation calculation, it is generally believed that the formation mechanism of adiaba-tic shear band in titanium alloy is dynamic recrystallization. At present, there are four mainstream viewpoints in the process of dynamic recrystallization, namely, traditional dynamic recrystallization, continuous dynamic recrystallization, twin dynamic recrystallization and phase transformation induced dynamic recrystallization.According to different dynamic recrystallization methods, the researchers established the basic deformation mo-del and theoretical basis, and found some experimental evidence. In this review, some typical research results reported in recent years dealing with the adiabatic shear bands about their morphology, properties and related formation mechanisms in titanium alloys subjected to dynamic plastic deformation are summarized. Typical formation mechanisms of adiabatic shear bands and related problems for titanium alloys are discussed so as to provide useful information for future research. © 2021, Materials Review Magazine. All right reserved.
