The un-uniformed deformation TiC particle reinforced titanium matrix composite has been studied. The results show that the deformed frictional constraint appears between the particle and the matrix and resists the deformation of matrix and strengthens it.By using the theory of elastic-plastic mechanics,the deformed frictional constraint calculated is 0.6 times of the strength of TiC particle,when the stress gathering appears on the interface and the dislocation resource are formed at a certain crystalline plane,a series of dislocation rings release and the stress gathering on the interface is freed,in the meantime the density of dislocation in the matrix increases,the dislocations tangle each other to form celluloid substructure and thus strengthen the matrix.