Titanium is a pretty cool idea, and it looks like it would be a neat smaller addition to the game.
However, the latest FFFs are telling us that lube will become a later game addition.
With that in mind, this could be a good opportunity to make the titanium extraction significantly more realistic. The simplest would be to require acid, but that would be very similar to uranium anyway. Much more interesting would be to add a new fluid, chlorine, which has to be extracted from water (assuming salt water here). You could use this as the fluid for the drills if you want to abstract away everything. You could also add a couple steps to the process in which the sodium left over from the chlorine extraction process gets added back to the TiCl4 to produce usable titanium. This could leave NaCl a byproduct, which then gets fed back into the chemical plants to produce Cl and Na again.
Just a thought for how to make the mod more realistic and a bit more complex at the same time.