I'll just say that yes, there are Ti replacement axles for some hubs, we need to know what exact hub, but it looks like you'll save maybe 7 grams over a hollow, steel quick release axle. Various levels of quality Ti you have to research also as I wouldn't trust an Ali Express special. Not sure there's much point to it.
Last edited by Crankycrank; 12-14-21 at 12:27 PM.