Using unbalanced magnetron sputtering technique, diamond-like carbon films with different titanium contents(Ti-DLC)were deposited on stainless steel substrates by changing Ti target supttering current. Investigated the influences of Ti content on microhardness, elastic modulus, film-substrate cohesion, fracture toughness, friction and wear behavior of films. Results showed that the hardness of the Ti-DLC films increases obviously compared with the pure DLC films. In the meantime, the hardness of the Ti-DLC films increases first and then decreases with the increase of the Titarget sputtering current and reaches the highest when Ti target sputtering current is increased to 1.5A. Film-substrate cohesion and fracture toughness of the films are improved by depositing some Ti. The friction coefficient of DLC films decreases significantly with the deposition of Ti.