Lost count, though I do have most receipts and yes, titanium can be pricey.
If done in small increments like I do, it doesn't ruffle your wallet knowing that you're that much closer to a goal.
At most, aluminum fasteners have replaced non-crucial holdings. Titanium goes where the strength is needed and pure Factory stock steel stays where it's really crucial.
Sixpackgut, if you haven't already checked, there's an incredible amount of info on Thumperdart's "Real world weight loss program" thread further on this board.
I think that there are many more big and small places on other parts of the front end that can shed pounds more diligently and safely.