Previously, the iPhone 15 will be upgraded to the titanium body. New reports said that the rear edge of the iPhone 15 will be rounded to form a new bezel, similar to the bottom edge of the shell of Apple's latest 14-inch and 16-inch MacBook Pro models. Compared to stainless steel

Previously revealed that the iPhone 15 will be upgraded to the titanium body. New reports said that the rear edge of the iPhone 15 will be rounded to form a new frame, similar to the bottom edge of the shell of the latest 14-inch and 16-inch MacBook Pro models of . Compared to stainless steel, titanium has relatively high hardness, which makes it more scratch-resistant, and its hardness makes it durable enough to bend less easily.

It is said that Apple's 2023 iPhone will use a titanium alloy body with a curved rear edge, replacing the existing square design. Apple recently investigated the feasibility of using titanium alloy shells for its products, including patents related to future MacBook, iPad and iPhone use of processed titanium alloys with unique properties.

Titanium's strength determines that it is difficult to etch and polish, so Apple has developed an sandblasting , etching and chemical process , which can make the titanium shell have a high gloss surface treatment and make its appearance more beautiful. Apple has also been studying the use of thin oxide surface coatings that can reduce fingerprint retention on the surface of the body.