One thing to keep in mind is that kit instructions are often made more in mind with saving the manufacturer paper than walking the modeler through a good sequence. Quite frankly, the build order is often quite stupid and apt to increase frustration, not decrease it.
As a general rule, it's best to build the core first, then add the fragile stuff. Particularly if you've going to be doing a lot of puttying and sanding, why would you want fragile davits in place that you can accidentally break?
For ships, I have an "up and out" philosophy. Start at the bottom, work your way up, adding parts, then out. Put the centerline guns on before the outboard guns, so that you're not reaching OVER the fragile parts as often. The practical flow of this is to build the hull first (if it has separate pieces), then the main deck (sans any detail pieces), then superstructure assemblies, etc.. If there are prop shafts and rudders, I usually leave those off until later as well, at least until the superstructure is down and I'm not doing as much manhandling.
Masts, even though they are generally on the center line, I usually leave closer to last, because they're larger and more prone to damage.
So for Titanic (I don't know the exact kit you're building, but I've built a couple of the older Revell kits), I would start with the hull and just add the decks without details unless you need to put them on before another deck goes in place. Leave the cranes, boats, stairs, etc., off until all of the decks are in place. Mount the stacks, then start on the smaller details.