Effects of ageing temperature on the microstructure and properties of in situ hybrid Ti-6 Al-4 V composites with TiB and TiC reinforcements were investigated. The results show that

with the increase of 673～873 K aging temperature

the martensite formed during solid solution treatment is decomposed gradually and transform to β phase with dispersive distribution and α phase. When the aging temperature is higher than 823 K

the β phase is coarsened. The mechanical properties of the composites aged at 773 K present the acceptable data

where the compressive strength

yield strength and engineering strain reach 1 970 MPa

1 632 MPa and 15.2%

respectively. The Vickers hardness of the composites is decreased with the increase of aging temperature. With the increase of wear loads

the friction coefficient of the composites is decreased and the wear loss is increased gradually. The wear mechanism under low load is characterized by abrasive wear

while the wear mechanism is characterized by co-action of abrasive wear and oxidation wear with the load of 50 N.