I took that to mean that any alloying that occurs is only right on the margin of the two metals, the way brazing traditionally works, too. But if they're really

I took that to mean that any alloying that occurs is only right on the margin of the two metals, the way brazing traditionally works, too. But if they're really planning on making titanium-copper mokume gane [1], I'm all in favor... 1: https://en.wikipedia.org/wiki/Mokume-gane https://en.wikipedia.org/wiki/Mokume-gane