T10 steel is a high-quality carbon steel alloy commonly used in the manufacture of Japanese swords and other types of knives. It is characterized by having a high content of carbon and other elements such as vanadium, silicon and manganese, which gives it excellent resistance and hardness . T10 steel is also known for its ability to hold a sharp edge for extended periods of time and for its ability to be differentially tempered to create a blade with a stronger edge hardness and slightly lower spine hardness.
All this makes it a popular and reliable material in the manufacture of edged weapons and cutting tools.