(TiB+TiC)reinforced Ti-6Al-4V matrix composites were in-situ synthesized through low energy milling and spark plasma sintering.The effects of sintering temperature and B

4

C addition on the microstructure and properties of the composites were investigated.The results show that sintered at 1 000～1 150 ℃

the reinforcments are distributed at the boundary of the original particles at 1 100℃

which is discontinuous in form of a network

and the yield strength

compressive strength and engineering strain of the composites reach the maximum value.Microstructure of matrix alloy presents lamellar Wei’s structure

which is flakyαandβin composites

and the grains of composites are refined remarkably.As the increase of the reinforcements content

microhardness is increased

while the engineering strain is decreased.The strength of the composites reaches the highest at 2% B

4

C addition

where yield strength and tensile strength reach 1 410.55 MPa and 1 771.65 MPa

respectively.