Titanium is about as corrosion resistant as there is. I would prefer the previous generation Ti 700. As long as you at least wipe the sucker down every couple of days, the SS won't rust and the Ti can't rust.
If the screws are NOT SS or Ti, I would treat them with something- this should give you a lot of latitude in taking care of it without worries.
When camping in cold weather, I always leave my rifle where it stays cold- I don't have any condensation issues that way. About 10+ years ago I was on a deer hunt in Montana with Muledeer. We were staying in motels and bringing the rifles in every night. A week went by and I tried to shoot a buck. My rifle went "click", twice. I had to use his spare at that point (an ULA in 257Imp).
When I got home, I found that the interior of the bolt was rusted, cushioning the firing pin which didn't fall hard enough!
That was an eye opener...
