Abstract Here goes the abstract. For instance, one can write that this work The experimental research of thin circular plate of pseudo-elastic TiNi alloy under fixed supports and transversal impact loading was conducted through using the modified apparatus of Split Hopkinson Pressure Bar. The experiment results of pseudo-elastic TiNi alloy was compared with that of A3 steel. The nature of dynamic mechanical response of the structure in spatio-temporal scale, including the propagation of flexible wave in the plate, evolution of transformation zones and full-field out of plane displacement were derived. The results show that transformation zones and transformation hinge may generate near the center of the plate (about 5mm) because of two-dimensional diffusion effect of the circular plate under impact loading. The transformation hinge disappears after unloading; however, the A3 steel plate has residual deformation obviously. The impact response of TiNi alloy thin circular plate is dominated by the thermo-elastic martensite phase transformation and inverse transformation, which differs from the conventional elastic-plastic transformation mechanism.