Originally Posted by 79pmooney

Another approach - calculate the density. Measure the wall thickness and diameter and the length. Calculate the volume. Weigh it. Yes, there is the larger diameter at the stem and you won't know if it is thicker walled there so your density won't known exactly but there is a very big difference between steel, ti and aluminum. I'm moving my study at this time so all my engineering books are put away but a quick Google search should get you those densities in any units system you desire. (Weight divided by volume = density,)`1

Edit: if I have Ti Cycles build me another bike, I'll discuss with Dave Levy if he can bend the seat tube. So it can come up from the BB at a 76 degree angle or steeper and curve back to put the seat where a 72.5 post would put it. And I can run a regular ol' 2 cm setback seatpost, center the clamp on the seat rails, and have adjust-ability for the rest on my riding life. And run big tires and fenders on short (under 16cm) seatstays.

Dave will know 1) if the bending is possible without issue and 2) how hard it will be and what to charge me! He knows titanium very, very well. I bet he's already thought through what he'd have to make to pull it off. This dream bike would also have a custom FD bracket to put the FD both far enough back on this really steep tube and inboard enough for a super low Q-factor with an ordinary ol' FD shifting a triple. And now no clamp where I want space for fender and tire. Fun with ti!