In order to study the application of Ti doped graphite-like carbon （GLC）films on bearing steel substrate at high temperature，Ti-GLC coatings were prepared on M50 steel substrate by unbalanced magnetron sputtering. Friction and wear tests were performed with Al₂O₃ ceramic balls at different temperatures and different sliding speeds to investigate the high temperature tribological properties and wear mechanism. The results show that the content of sp2 increased with the temperature increase. Meanwhile， the hardness and elastic modulus decreased gradually， the adhesion force displayed a slight downtrend. In the range between RT and 200℃， the prepared Ti-GLC films maintain excellent low friction and wear resistance， therefore is the best service temperature range. At 200 mm/s， the wear mechanism gradually change from slight adhesive wear and abrasive wear to severe abrasive wear and oxidation wear with the increasing temperature.