Doxa, a brand known for its iconic dive watches, has recently introduced a lightweight titanium upgrade to its flagship SUB 300 model. This move marks a significant shift in the brand's approach to titanium, as it has traditionally reserved this material for limited edition, one-off designs. The new SUB 300 Ti5 is a faithful execution of the original SUB 300 blueprint, with a 42.5mm-wide elliptical cushion case topped with the brand's proprietary unidirectional bezel. What makes this particularly fascinating is that Doxa has managed to add the lightweight strength and corrosion resistance of Grade 5 titanium without disrupting the celebrated SUB 300 look introduced in 1967. Personally, I think this is a bold move that showcases the brand's commitment to innovation and its ability to push the boundaries of traditional watchmaking. In my opinion, the SUB 300 Ti5 is a testament to Doxa's expertise in crafting high-quality, durable watches. The case, crown, bezel, and caseback are all made of Grade 5 titanium, which is known for its exceptional strength and corrosion resistance. This attention to detail is what sets Doxa apart from other watch brands. One thing that immediately stands out is the brand's decision to offer the SUB 300 Ti5 in five different colors: Professional orange, Sharkhunter black, Caribbean blue, Red Coral, and Whitepearl. What many people don't realize is that the Whitepearl model features a fully-lumed dial, much like the coveted Topper Jewelers limited-edition series. The white dial is entirely coated in a faint green-emission Super-LumiNova, while the hands, hour markers, and pip feature brighter green lume. This attention to detail and the use of high-quality materials are what make Doxa watches so desirable. However, the SUB 300 Ti5 is not just about looks. It also boasts a Swiss automatic movement that is COSC-certified, ensuring accurate timekeeping. The watch is water-resistant up to 300m, making it suitable for diving and other water activities. From my perspective, the SUB 300 Ti5 is a must-have for any watch enthusiast. It combines the brand's iconic design with the lightweight strength and corrosion resistance of Grade 5 titanium. The availability of the watch in five different colors and the fully-lumed dial make it a versatile and desirable choice. If you take a step back and think about it, the SUB 300 Ti5 is a testament to Doxa's commitment to innovation and its ability to push the boundaries of traditional watchmaking. This raises a deeper question: what will the brand do next? What this really suggests is that Doxa is a brand that is constantly evolving and pushing the limits of what is possible in watchmaking. A detail that I find especially interesting is the brand's decision to offer the SUB 300 Ti5 only on a woven-textured rubber pin-buckle strap. This is in contrast to the brand's customary beads-of-rice bracelet or its rubber strap with a folding diver extension clasp in titanium. This choice of strap is a nod to the brand's heritage and its commitment to tradition, while also showcasing its ability to innovate and experiment with new materials and designs. In conclusion, the Doxa SUB 300 Ti5 is a must-have for any watch enthusiast. It combines the brand's iconic design with the lightweight strength and corrosion resistance of Grade 5 titanium. The availability of the watch in five different colors and the fully-lumed dial make it a versatile and desirable choice. Personally, I think this is a bold move that showcases the brand's commitment to innovation and its ability to push the boundaries of traditional watchmaking.