The whole Ti bike for life thing is so unlikely to be realised. If you’ve spent that much on something high end, eventually you’re going to want something more current, and that’s assuming it hasn’t broken or become too outdated to find components.
Ti does look great though, and I remember lusting after all the beautiful Ti frames they had at Bikepark in Covent Garden where I used to leave my bike every day. However my first awareness of Ti bikes was someone from Brixton Cycles who was already hoarding 1″ headsets and SID fork spares for her Ti Bontrager, and that was before frames even had disc tabs which came in pretty quickly for XC once they got almost as light as V’s.
Personally I want a bike that I’m going to enjoy riding as much as possible. I’ve never done many training miles, but I used to go ok anyway, and I’d just ride what your proper roadies regard as summer bikes (possibly too good for racing) all the time whatever the weather, ride, or event. Sod the minor extra expense, ride your race tyres, wheels, etc because it’s pleasurable using them.