I had a titanium coated fisher for a while. The "waist" of it discoloured since opening and closing the pen tended to wear away the coating.
I was so anal that for a while, I rubbed all the black coating off my regular annodized one and paid $80 to have it Nickel Plated. Lasted a while.
However, the pen was now thinner and the cap slid much farther down the length when put on the "butt" end.
I told Fisher about it, and they said I was the first person to do that.
Anyhow... I'll stick with Chrome... Silver would never wear, but I don't like the way it tarnishes, and I'm not paying for a Solid Gold Fisher!
Chrome is cheap, cheerful, and I find 'em at good prices on Ebay.
Phil