The author had a change in opinion about using titanium in phone chassis after experiencing the toughness and durability of phones like iPhone 15 Pro Max and Galaxy S25 Ultra, which benefited from titanium.
The author, who does not use cases for flagship phones, appreciates the durability of titanium as it prevents chips, dents, and scratches resulting from accidental drops.
While the author hopes more phones will utilize titanium for durability, the rumored iPhone 17 Air is expected to use an aluminum frame instead of titanium to prioritize thinness and lightness over toughness.
The author expresses concern about the potential lack of toughness in the iPhone 17 Air due to the choice of aluminum, hoping Apple will find a balance between lightness and durability, possibly introducing an innovative alloy or design.