Doxa Adds Grade 5 Titanium to the Core SUB 300 Collection

Doxa’s SUB 300 has always been a watch with real tool-watch credibility rather than borrowed dive-watch theatre.

The new SUB 300 Ti5 gives that familiar silhouette a meaningful material upgrade, moving Grade 5 titanium into the core collection after its earlier appearance on the limited Clive Cussler edition.

It keeps the size, colour and underwater intent that define the model, but the change in metal alters how the watch feels on the wrist.

At a glance

Grade 5 titanium changes the feel of the SUB 300

The SUB 300 remains a substantial watch at 42.5mm across and 13.4mm thick, yet titanium makes the proportions much easier to live with.

That matters because Doxa’s cushion case has never been shy on the wrist.

Grade 5 titanium is the key upgrade here, bringing a lighter wearing experience while also offering greater strength and scratch resistance than the Grade 2 titanium more commonly used in watchmaking.

The harder surface also allows Doxa to play with finishing in a way that would be far more difficult on softer titanium alloys.

The case body is brushed, while the outer bezel ring and toothed grip are polished, giving the watch more contrast than a fully utilitarian titanium execution would normally allow.

That polished edge can shift dramatically in different light, at times appearing much darker because of the mirror-like reflection.

Five Doxa dial personalities

Doxa hasn’t treated the Ti5 as a single-material experiment with one safe colourway.

The collection arrives with five dial options, covering Orange Professional, Black Sharkhunter, Blue Caribbean, Red Coral and Whitepearl.

The orange dial remains the historically loaded choice, especially for collectors who associate Doxa with the era-defining visibility of its classic dive watches.

Red Coral brings a fresher note to the range, while Whitepearl is the technical standout thanks to its full-lume display.

The Whitepearl and Red Coral versions are offered with either a matching Dive Flex rubber strap or a black strap, taking the total number of references to seven.

Across the line, the watch stays firmly in Doxa territory with a rubber strap and pin buckle rather than leaning into dressier bracelet-led positioning.

A chronometer movement behind a solid caseback

Inside the SUB 300 Ti5 is the Sellita SW200-1 automatic movement in COSC-certified chronometer specification.

It’s a pragmatic choice for a professional dive watch, giving the collection a proven Swiss calibre with certified accuracy credentials.

The movement runs at 28,800 vibrations per hour and provides hours, minutes, seconds and date functions.

Its 38-hour power reserve is modest by current standards, though it suits a watch intended to be worn often rather than left waiting in a box.

The solid caseback helps preserve the tool-watch character and the watch is rated to 300 metres, which keeps the SUB 300 Ti5 aligned with the professional brief that has long underpinned Doxa’s reputation.

Details & Specifications

The price increase over the steel SUB 300 is relatively restrained for a Grade 5 titanium case, especially with the COSC movement still in place.

This isn’t a reinvention of the SUB 300, and it doesn’t need to be.

For collectors already drawn to Doxa’s distinctive case shape, bright dials and no-nonsense dive-watch heritage, the Ti5 makes one of the brand’s signature watches lighter, tougher and a little more refined on the wrist.