DOXA SUB 300 Ti5: Grade 5 Titanium Returns to the Permanent Collection

Almost sixty years after revolutionizing recreational diving with the launch of the original SUB 300 in 1967, DOXA writes a new chapter in its technical history with the official return of Grade 5 titanium to its permanent collection. The new DOXA SUB 300 Ti5 evolves the brand’s iconic cushion case using a material that is 40% lighter than stainless steel and significantly more resistant to marine corrosion. The series debuts in seven distinct execution options covering the brand’s historic colors alongside a striking Whitepearl dial fully coated in Super-LumiNova.

Grade 5 Titanium: Ergonomics and Technical Performance

Integrating Grade 5 titanium into the case, crown, and screw-down caseback responds directly to the pursuit of maximum ergonomic comfort during extended wear. Thanks to its exceptional strength-to-weight ratio, chemical inertness against saltwater, and natural biocompatibility, the SUB 300 Ti5 drastically reduces perceived wrist weight without sacrificing the structural rigidity indispensable in a professional diving instrument.

Its case retains the classic dimensions of 42.50 mm in width by 45.00 mm in length and an overall thickness of 13.40 mm, topped by a glass box domed sapphire crystal with anti-reflective coating. It keeps intact the signature unidirectional rotating bezel patented by DOXA, whose dual-scale engraving links dive depth in feet with the non-decompression limit times established by the US Navy.

Seven Variants and COSC-Certified Calibre

The SUB 300 Ti5 lineup displays the signature colorways of the Swiss brand: the unmistakable orange Professional, black Sharkhunter, deep blue Caribbean, cherry red Red Coral, and two executions for the white Whitepearl (paired with either a white or black rubber strap). All models are delivered with the new Dive Flex rubber strap featuring a “Tissé” woven style texture and pin buckle.

Mechanically, each unit is powered by a Swiss automatic movement (Sellita SW200-1 base) backed by official chronometer certification from COSC. The movement operates at a frequency of 28,800 vibrations per hour (4 Hz), integrates 26 jewels, and provides a power reserve of approximately 38 hours, ensuring precise performance under demanding operating conditions.

Pros and Cons

Pros:

• Case, crown, and caseback crafted in Grade 5 titanium, offering exceptional lightness, durability, and high resistance to seawater corrosion.
• Automatic mechanical movement with individual chronometer certification issued by COSC.
• Inclusion of the stunning Whitepearl variant featuring a fully luminescent dial.

Cons:

• The 38-hour power reserve reflects traditional standards for 4 Hz movements.
• The cushion case’s 42.50 mm diameter can create visual misperceptions regarding its actual dial proportions.

Technical Specifications: DOXA SUB 300 Ti5