___________ improves toughness, wear resistance, and high temperature strength.

Common types of cutting tool materials are:
Carbon tool steel
High-speed steel
Cemented carbide
Ceramics
Cubic boron nitride tool (cbn)
Diamond tool

Cutting tools should have the following characteristics:
High strength and hardness at higher or lower temperatures
No change in material properties over time
High toughness
Ability to withstand shock and vibration
Low price