In this study, TiN/CP-Ti composites are successfully prepared using selective laser melting (SLM), and the effect of TiN content on the microstructure, microhardness, and wear behavior of Ti-based composites is studied. Results show that diffraction peaks of the α-Ti phase shift, diffraction intensities of the TiN gradually increase, and microhardness of the composites also increases from (228±13) HV to (403±20) HV with increasing TiN content. When the mass fraction of TiN is increased to 7.5%, wear resistance of the composites increases by 29.2% compared with that of CP-Ti. It shows that the addition of TiN particles can improve the microhardness and wear resistance of SLM-produced Ti-based composites.