Ti-plated diamond surface by molten salt was investigated.The phases of Ti-plating are TiC and Ti,and diamond-TiC-Ti structure model of Ti-plated diamond surface was established.The desquamating grade of diamond and the holding force coefficient between matrix and diamond were suggested as new concepts.A comparison of the diamond saw blade using ordinary diamond with that using Ti-plated diamond reveals that the desquamating grade of diamond reduces from 72.2% to 32.3%,representing a decrease of 39.9%;the holding force coefficient between matrix and diamond increases from 75.6% to 92.81%, an increase of 17.21%.