Graphene and TC4 prealloyed powders were mixed by ball milling method. Then, spark plasma sintering(SPS) process was applied at 1 200 ℃ to fabricate graphene/TC4 composites. The morphology and phase structure of the composite powder were investigated by scanning electron microscopy(SEM) and X-ray diffraction(XRD). The microhardness and compression performance of the composites was also analyzed by microhardness tester and Gleeble-3800 D. The results show that the graphene/TC4 composites are compact and graphene and TiC generated in situ from TC4 precipitate at the grain boundaries, which improves the mechanical properties of the composites. The compression strength and yield strength of the composites at room temperature are increased by 17.03% and 12.5% compared with the matrix. Hardness and elongation are increased by 18.2% and 60% respectively. The addition of graphene refines the grain and reacts with the matrix to generate TiC particles, which enhanced the matrix.