The chemical stability between TI(CN) base cermet inserts and workpieces is relatively high, which reduces the friction and temperature of the cutting edge during cutting, preventing mutual difusion of atoms of the workpiece material and the inserts, and improving resistance to bonding abrasion. Therefore, TI(CN) base cermet shows good capability of Red Hardness and resistance to crater wear. It is an optimal material for high-speed finishing and semi-finishing of steel. High temperature strength of cermet is higher than that of WC-Co, and toughness better than that of Al2O3 and SisN4 ceramic. This fulfis the application blank of WC-base cemented carbide and Al2O3 and SisN4 ceramic from finishing to semifinishing at high speed.