I like the blue covers. I wonder if you can choose them for any model. Has anyone done a comb in Titanium before.
Ray 
I have 2 titanium combs, one for an MK and one for a Suzuki 14-hole chromatic. While their dimensions are identical to the combs they are modeled after, I can't help but feel that they sound mellower (ie duller) than their brass or aluminum equivalents. I'm not getting into a debate about what affect materials have on sound, just that this is my own personal experience with titanium combs. They are comparatively lighter than brass combs.