Shock loading influence on deformation martensite transformation is experimentally investigated in austenitic and perlitic steels with different grain size and titanium alloy. The martensite transformation front propagation velocities and their connection with grain size in steel are defined by means of the combination of two techniques: laser interferometer technique that permits "in situ" to register time characteristics of material response on shock loading; optical, electron microscopy, X-ray analysis and quantitative metallography.