Apple might be having second thoughts about aluminum on the iPhone. A few months after switching the iPhone 17 Pro away from titanium, the company is now reportedly experimenting with an improved titanium alloy that could fix a huge problem with the metal.
If Apple finds a way to make it practical, we could see titanium return to a future iPhone Pro. But the problem is that titanium isn’t as good as aluminum at transferring heat. Aluminum’s better thermal properties are likely why Apple moved away from titanium in the first place. Also, aluminum is cheaper and easier to recycle.

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