I am interested in techniques than can be used to work harden materials apart from hammering. I would like to know some techniques that wouldn’t add any sort of texture, as hammering with a plain metal hammer would result in a hammered texture, which is nice but not what I’m going for. Tumbling doesn’t penetrate the material and lead to any sort of true added hardness. Heat hardening isn’t an option as I’m more interested in using pure metals such as fine silver. I am guessing some method of twisting the material? Maybe hammering and then filing the texture off, but this sounds pretty wasteful.
Curious to hear your input,