A Stainless slide makes more sense if one wants Shiny. Personally, I like all black. But you're correct. Titanium while very strong, is Light. That on a Polymer frame in a 40 cal or 45 cal and you have yourself some very snappy recoil & muzzle flip.I cannot concieve of any good reason for a Titanium Slide on the XDm. Yes, it would reduce the mass but that would come at a price. I suspect that less mass in the slide would require a much stiffer recoil spring in order to slow down the slide movement during discharge. As a result of this, the recoil pulse would become harder and sharper. In addition, that reduced mass will also act to increase recoil even further as a byproduct of that mass reduction. So, in terms of recoil, it's a double hit, stiffer springs that transfer the force more readily, and a reduced pistol mass that increases recoil due to simple Physics. In addition, losing all that mass forward on the pistol will make muzzle flip a real problem. Bottomline, it would turn a pistol that is rather enjoyable to shoot into an unpleasent hand hammering beast.