Abstract: According to the pure bending theory of beam, the energy principle of crack propagation, and a four-point bending model, the relation between the crack energy release rate of Ti/Al₃Ti laminate composites was established. The mechanical behavior of materials in the fracture process was studied, and the analytical relationships of the fracture mechanical behavior was also obtained. The corresponding curves of material layer number and layer thickness ratio on the fracture work were given through the contrast with Al₃Ti blocks. Results show that this analytical method can be used to analyze the mechanical behavior of the main crack extension of Ti/Al₃Ti, and the fracture mechanical analysis of the other metal-intermetallic laminate composites can draw lessons from this method.