@thekingisdead it’s cracked. PX are honouring the warranty and have been great so all good there. They don’t want the frame back so it’s mine to dispose of. With alu frames I’ve cracked I’ve put them in the recycling, but I don’t think the council would recycle titanium. So I’m just trying to be more imaginative than dropping it in the landfill.
If you’re asking for details on the crack. The 456 has a forward facing slot on the seat tube ending just above the top tube, possibly too close and in the heat affected zone. The crack is a fatigue crack due to leverage of the seat post (as a chartered engineer that’s my view, its also enigma’s). Its started at the bottom on the slot and run just above the top tube weld, around the seat tube and has just reached the top of the weld to the chainstay.
Enigma have quoted for a proper repair, cutting out a piece of the seat tube, welding in fresh and also shimming. I’d not be surprised if the repair would leave the frame better. However it’s a 5 hours work as it’s a tricky repair.
Could it just be welded up and dressed? Given its on top of 2 welds and the leverage stresses would remain…I won’t bother spending money on a temporary repair like that.