Titanium diboride/Titanium carbide (TiC-TiB2) composites are promising materials for applications such as super-hard cutting tools and abrasives, wear resistant parts and space vehicles. It is very difficult to densify these materials using conventional sintering techniques. In this study, reactive sintering was used to simultaneously synthesis TiB2 +TiC composites in different combinations (amounts) of carbon in the stable other conditions same as time, temperature,... It was found that the chemical reaction between the starting Titanium metal, Boron and Carbon particles could be complete after sintering at 1200⁰C for 1 h, producing a pure TiB2-TiC ceramic composite. Various carbon content causes the microstructure of the final products was different.