What type of hard alloy has the most toughness?

The CrCoNi alloy, composed of chromium, cobalt, and nickel, has been identified as one of the toughest materials on Earth. Its exceptional toughness arises from the atomic structure of its crystalline lattice, which undergoes changes when force is applied to the alloy. This unique characteristic contributes to its remarkable resistance to deformation and fracture.

 Additionally, platinum-gold alloys have been engineered to possess high wear resistance, making them among the most wear-resistant metal alloys known. While various hard alloys exhibit impressive toughness, CrCoNi and platinum-gold alloys stand out for their exceptional mechanical properties.