In this study,the titanium matrix composites(TiMCs)was fabricated by adding graphene nanoplatelets(GNPs).The dynamic compression test was carried out to study the effect of strain-rate and the GNPs content on dynamic mechanical properties of GNPs/Ti.Results show that the GNPs content(0wt%~0.8wt%)correspond to specific microstructure and affect the dynamic mechanical properties of the composites.Under high strain-rate(3500s-1),the 0.4wt%GNPs/Ti has the highest dynamic stress(~1860MPa)and strain(~30%).The adiabatic shearing band(ASB)microstructure of GNPs/Ti with various GNPs content has been observed under 3500s-1 strain-rate and the ASB microstructure evolution of 0.4wt%GNPs/Ti under different strain rate is investigated in particular.The strain-rate sensitivity is also studied and results show that thermal softening paly a leading role to the composites.