Al
Density of Ti = 4.506g/cm3
Density of Steel (variable as its an alloy) is around 7.9g/cm3
So no. It’s not half the weight 🙂
Strength, from what I can google, is roughly similar, yes. But the facts I can find don’t relate to bicycle tubing in any way. For instance, all us cyclists know that Reynolds 853 is stronger than most other tubing and actually gets stronger when heated at the welds, yes?
Scratch that! Just found the facts;
Reynolds 6Al-4V Titanium – Seamless ELI Grade. UTS: 900-1150 MPa, density 4.42 g/cm3
Reynolds 853 – Seamless air-hardening heat-treated. UTS: 1250-1400 MPa, density 7.78 g/cm3
So it’s not half the weight and nor it is as strong as a quality steel.
And now we know why it breaks.
Here endeth the thread. 😉