Board Thread:Suggestions forum/@comment-28949347-20160524011018/@comment-26172435-20160524201932

Titanium Nitrate is Ti(NO3)4. Titanium Nitride is TiN. The latter is use to coat and harden the surface layer of toolbits and shiny stuff. Definitely not a technology of medieval ages, not is the production of Ti(NO3)4.

I don't dig the notion of just rubbing stuff over a 'late hot melt of metals mixed with salts and carbon' to blacken it when its dead cold and shaped to last forever. With medieval technology, only reforging a blade and treating it in some 'blackening' stuff could do the trick, at the cost of the blade becoming brittle I guess. I'm not a materials engineer by the way, but I got some education on the matter.