In-situ β-Ti toughening of Ti-based bulk metallic glass matrix composites have been synthesized by the Bridgman solidification, and the microstructure, phase composition and chemical composition of this material has been studied by using XRD, SEM, EBSD, TEM, EDS and three-dimensional reconstruction method. Based on these, the deformation process was studied by using in-situ SEM and EBSD. The results showed that the crystal phase is dendritic morphology, which has the very good connectivity and the secondary dendrite arm of 1~3 μm. The chemical composition of dendritic crystal phase is Ti_62.4 Zr_18.4 Cu_2.6 V_16.6 (at %) and the amorphous matrix is T₄₅Zr_34.8Cu_10.6V_9.6 respectively.