I owned an IWC AMG in titanium (bracelet reference).
Although it was bulky (15 mm thick are too many for me), it was impressively light; i tried the steal model and it was a manhole.
I've been used to wear thin watches (one 15202, right now GP 8010), thus lightness and thickness do matter for me.
I am curious to try it on, because i love also the warm feeling of titanium