Titanium is the new hot watch material that’s spreading like wildfire. Even the world’s most famous watch brand can’t escape it, and they’ve cast their biggest and deepest diver in the stuff. The Rolex Oyster Perpetual Deepsea Challenge measures in at a substantial 50mm (start working on those wrist curls) and can manage depths of 11,000 meters. It uses premium Grade 5 titanium alloy known as RLX, which is light and tremendously durable. The Deepsea Challenge features a standard helium escape valve, Rolex’s patented Ringlock system and Triplock crown with three sealed zones. For low light legibility, there’s the excellent Chromalight display. Underneath it all is Rolex’s in-house caliber 3230 with a 70-hour power reserve. The movement is Superlative Chronometer certified to rigorous standards. The price is as substantial as the watch’s features and physical presence. If you buy one, you should probably know how to dive lest you risk severe poseur status.