https://arstechnica.com/gadgets/2021/07/a-redesigned-titanium-iphone-is-headed-our-way-investor-note-says/

A new investor note from JPMorgan Chase seen by AppleInsider and MacRumors claims that Apple's high-end iPhone models will soon use titanium alongside or instead of aluminum or stainless steel. It also provides new insights about what to expect from 2022's iPhone lineup.