Ti for things … like pedal axles.

[doctor-bond]

Great info on how your pedals fared and the relative environmental impact is interesting (isnt ti quite abundant but tricky to refine? )
Linky

It is wonderful though, and I’ve chased useful lightening with: stems, quill bolts, bbs, seatposts, bolts and even axles. But all of those add up to about the same as a couple of days fasting or a big piss before your ride. Weight saving off ‘the engine’ becomes much more critical with advancing years and slowing metabolisms!

 

[2manyoranges]

Er … that reference doesn’t give detail on environmental profile

https://redstonemanufacturing.com/aluminum-vs-titanium/

This next link shows that it is completely free of any environmental impact...Hurrah!!!!

https://keitheurope.com/en/blogs/nos-articles/the-positive-environmental-impact-of-titanium-products#:~:text=Titanium is an exceptionally environmentally,human health or the ecosystem.

....from a re-seller of ti. Hurrah and hurrah again!

Hmmmm.....

then read this:

Ti Oxide production for pigments eg paint and sunscreen:
https://www.sciencedirect.com/science/article/pii/S0195925523003785

Feng et al 2023
'the Kroll process used to commercially produce titanium sponge is inefficient, energy-intensive, and highly polluting to the environment...'
Research Progress of Titanium Sponge Production: A review - Metals 13(2) 2023

Production of primary Ti using the Becher & Kroll process has some nasty chemical-intensive and energy-intensive steps, see:

https://www.sciencedirect.com/science/article/pii/S0959652606002320

Of course once produced as a primary metal, Ti, like Aluminium, is ready recycled. Ti has the problem of difficult machining, which itself produces environmental load.

Readily recycle my Stanton ti frames! No way....

 

[Twozaskars]

Yay - when someone puts together an anti-ti group they will demand that we all scrap our ti bikes and replace with greener steel or aluminium ones.

 

[benjabbi]

Yay - when someone puts together an anti-ti group they will demand that we all scrap our ti bikes and replace with greener steel or aluminium ones.

Yeah, completely ignoring the fact that the 'damage' is already done, in a lot of cases on here, thirty years ago and you can't take it back. Surely continued use of the already built frame/component is greener than scrapping it and buying new?
Edit: I have gone down the Ti route, I have really nice riding bikes made of steel, aluminium and carbon but, whether it's all in my head or not, the Ti one is exceptional.