Apple is mixing metals for its upcoming foldable iPhone. Analyst Jeff Pu revealed that the 2026 foldable iPhone will feature a frame made from both titanium and aluminum, marking a significant materials choice for the company’s first foldable device.
The decision to use a titanium and aluminum frame makes sense when you consider the engineering challenges. The device will measure just 4.5mm thick when unfolded, making it even thinner than the iPhone Air. That extreme thinness demands materials that can prevent bending while keeping weight manageable. Titanium brings strength to stress points while aluminum cuts down on bulk elsewhere.
This isn’t the first time we’ve heard about mixed materials for the foldable iPhone frame. Apple analyst Ming-Chi Kuo previously suggested the device would combine titanium with stainless steel instead. He claimed the hinge would use both metals, with some components made from Liquidmetal for added durability. However, Pu’s latest report points specifically to titanium and aluminum, though it’s unclear whether Apple is creating an alloy or using each metal in different sections.
The approach mirrors what Apple already did with the iPhone Air, which uses titanium to resist bending. Multiple bend tests confirmed that decision paid off, so it makes sense to carry that strategy forward. Since titanium weighs more than aluminum, Apple likely plans to use titanium only where the frame needs maximum strength, then switch to aluminum for other areas.
Samsung has been using titanium across its flagship lineup, though the material brings its own challenges. It costs more and proves difficult to work with during manufacturing. Still, the results speak for themselves when durability matters.
The foldable iPhone is expected to launch in September 2026 as part of the iPhone 18 lineup. Rumors suggest a 5.5-inch display when closed, expanding to roughly 7.8 inches when opened. Some analysts at JPMorgan are already predicting massive success.
