Titanium work and heat hardens, doesn't it? Certainly a ****er to grind, anyway... Cuts easy as long as you keep it going but once you stop, starting again's a bit harder. That'd make it harder to polish I reckon.
I just scrape the burned-on rubish off mine with a scotchbrite pad, I reckon the dull grey finish is nicer than a shiny stainless one... But if I let the oil and salt burn on it looks rusted, and nobody believes it's titanium
