My super-scientific "is titanium" test involved trying to get a fridge magnet to stick to them. it won't, and a normal keyring will. Yes, that risks it being aluminum. Other reviews state they put one against their sanding machine and got white sparks which was an additional positive sign.

If you want to confidently get titanium, these: https://thejamesbrand.com/products/titanium-keyring

They also make the carabiner I mentioned: https://thejamesbrand.com/products/the-mehlville?variant=312...

And here's a beer bottle opener to complete your collection: https://thejamesbrand.com/products/the-tjb-bottle-opener-tit...