Since γTi-A1 intermetallic compounds displays outstanding mechanical and physical properties,especially the high specific strength and excellent performance at high temperature,it make yTi-Al has a great potential in the application in aerospace engineering and weapon industry.And thus the research on γTi-Al mechanical properties has caught much attention in the last several decades.Therefore,it is imperative to understand the fundamental mechanical and physical properties of yTi-A1.In present study,we have performed large-scale molecular dynamics (MD) simulations on γTi-Al to study the mechanical properties and wear mechanism at nanoscale.The nanoindentation test on γTi-Al materials is carried out by using MD simulation in which the diamond tip was assumed to be rigid.