Ti(C

N)/TC4 composites were prepared by spark plasma sintering using graphite carbon nitrification (g–C

3

N

4

) as nitrogen sources and carbon sources. By changing the addition amount of g–C

3

N

4

the composites with different Ti(C

N) contents were prepared

and the microstructure

hardness and tribological properties of the composites were studied. The results show that Ti(C

N) prepared in-situ is granular

and the overall distribution is gridded

and the interface of Ti(C

N) is well combined with the TC4 matrix. With the increase in the amount of g–C

3

N

4

added

the hard

ness of the composite material continues to increase

and the friction resistance first increases and then decreases. The composite material prepared by adding mass fraction 5% g–C

3

N

4

has higher hardness and excellent wear resistance. The hardness is 627.68HV

which is 44.4% higher than the pure TC4 titanium alloy sintered sample. The friction coefficient and wear amount are 0.2608 and 0.056 mm

3

respectively

which are 29.3% and 61.6% higher than that of TC4 sintered samples.