Aluminum hinges will absolutely NOT work on a Titanium.
There are basically two types of Titaniums -- ones with a VGA port, and ones with a DVI port. There are all kinds of differences between them. If your hinge is broken and you want to replace it, I'd recommend buying a dead machine with a good screen assembly on eBay, because it's going to be far cheaper than anywhere else. Again, remember to get one that is similar to yours, i.e. VGA or DVI.
Also, you're going to want to replace the entire screen assembly, hinge and all. The metal strips around the screen itself are very difficult to remove without damaging them, so you will save yourself a lot of work and be doing yourself a favor by simply swapping the entire assembly.
Lastly, the Titanium is a very old machine which is not worth a lot of money, and most of them are pretty flaky at this point. A screen/hinge replacement is a very complex procedure which requires partial removal of the logic board. I would give a lot of thought to whether or not you really want to take this on, or if replacing the machine with something newer would be a better option.