Bladesmithing is the craft of creating Knives, Swords, Tomahawks, and other bladed Weapons.
Bladesmithing is a Martial Art, because of the potienal for Combat usage of Blades.
A person who does bladesmithing is said to be a Bladesmith.
The art of bladesmithing likely came out of Blacksmithing.
In the past bladesmithing was a secretive craft. And was one of the pillars of what was Warfare and Martial Arts.
Today there has been a movement, by some, to remove all secrecy surrounding the craft, and educated all those about the craft who are willing to learn.