The upcoming iPhone 15 Pro models are expected to have a titanium frame and thinner bezels. The titanium frame is said to be stronger and lighter than the stainless steel frame currently used on the iPhone

The thinner bezels will shrink the size of the black border around the screen by about one third. In addition to the new frame and bezels, the iPhone 15 Pro models are also expected to have a customizable mute button and a USB-C port instead of the Lightning port.
The customizable mute button will allow users to assign different functions to the button, such as launching a specific app or turning on Do Not Disturb. The USB-C port will allow for faster data transfer and charging.
The iPhone 15 Pro models are also expected to be more expensive than the current iPhone models. Some analysts are expecting a price hike of up to $200 for the Pro Max model. The official launch of the iPhone 15 Pro models is expected in the coming months.