Ti(CN)-based cermets have been used successfully for high precision machining operation.The addition of secondary carbides or nitrides greatly improves Ti(CN)-Ni cermets in terms of not only mechanical properties but also densification of the cermets.The amounts and types of dissolved carbides along with sintering duration are important determinants of core/rim structure, which is typical in Ti(CN)-Ni cermet systems.Recently considerable attentions are being made on the tool materials composed of solid solution carbides.These carbides provide significant changes in microstructure and properties.In this presentation (Ti,W)C-based complete solid-solution cermets will be introduced and their microstructure and properties are compared to WC-Co.Based on the results, the effectiveness of these carbides in tool performance will be discussed.