There's no Canada like French Canada, it's the best Canada in the land!
Sorry, just couldn't help myself.
If you look in the General Discussion forum (the same one you posted in), I've once tossed up a guide explaining most, if not all, there is to know about nodes and routing. It's named
Carbonite Nodes, Routing, and You. It holds your answer, and with pictures too!
Finally, Titanium is a rare spawn of Saronite nodes, so to find all the Titanium nodes to can, route through both Titanium and Saronite.