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Rik_Van_Looy
At the Advanced Engineering show at the NEC last year, I think it was Renishaw had 3D printed polished Ti bars on display. They were track sprint and TT bars used by various Olympians including Chris Hoy. They were thin wall Ti with a lattice core (which they were being a bit vague about, presumably because it was their IP). They were made in multiple pieces and bonded together, not welded. They claimed they could make them stiffer than an equivalent carbon bar - something me and my F1 colleague found surprising. However, given the complicated shape of a curved bar and the very directional qualities of carbon, it’s quite probably the case.