FWIW, zenstoves.net says: "Titanium cookware tends to not evenly distribute the heat from your stove and may create hot spots and burn your food. Hot spots are not a real concern if you are just boiling water."

I have a titanium mug that I use to heat water using an alcohol stove, which isn't the fastest way to heat water, and it works fine for me.

I think that either is fine. But then, my feeling is that once you have something that's at least "pretty good" then unless you're a real stove enthusiast, getting the absolutely most efficient stove setup isn't a good use of time or money.

Caveat: I typically don't bring a stove on trips of less than a few weeks, though I have heated my food on trails many a night in the past using a variety of (mostly alcohol) stoves.