Polar has launched the Grit X Pro outdoor smartwatch, and although it doesn't seem to have changed much over the current model, it does also come in titanium.
Polar Grit X Pro Titan first look: Premium materials, dashboards, tests and coaching
Polar Grit X Pro lighter in Titan(ium), Vantage V2 update too! - Bikerumor
Polar Grit X Pro - GPS Multisport Smartwatch - Military Durability, Sapphire Glass, Wrist-based Heart Rate, Long Battery Life, Navigation - Ideal for Outdoor Sports, Trail Running, Hiking : Electronics
Polar Grit X Pro review: a fitness watch that matches your fit - The Verge
Polar Grit X Pro Titanium Strap 'Classic' (Graphite)
Heart Rate Monitors
Titanium Metal Bracelet For POLAR Grit X Pro Titan Strap Wristband For POLAR Vantage M2 M Smartwatch Band Watchband Accessories - AliExpress
Polar Grit X Pro - GPS Multisport Smartwatch - Military Durability, Sapphire Glass, Wrist-based Heart Rate, Long Battery Life, Navigation - Ideal for Outdoor Sports, Trail Running, Hiking : Electronics
Best Polar watches 2024: Tested & reviewed