During its September 2023 event, Apple took the wraps off its iPhone 15 Pro and Pro Max smartphones, confirming previous rumors about the big transition to a titanium body — and not just any titanium, but specifically the Grade 5 variety used by NASA for its Mars Rover. The company describes the painstaking lengths it uses to give the iPhone 15 Pro lineup’s titanium a brushed appearance, not to mention the contoured edges for improved ergonomics and the Ceramic
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