Steel and titanium cases are both reliable choices for a watch case material. However, they are very different from eachother in the way they behave against damage, heat, and other environmental factors. In this article, we go over some of the main differences between them. 

Weight Differences: Titanium is Lighter

Titanium weighs about 45 percent less than steel. A 45mm Blancpain Fifty Fathoms in titanium weighs close to what a 40mm steel diver does. On large cases, 44mm and up, the difference is the main reason to buy titanium. On a 38mm dress watch, nobody notices.

Which steel, which titanium?

Not all steel is the same, most brands use 316L. Rolex uses 904L, marketed as Oystersteel, with higher chromium and nickel for corrosion resistance and a brighter polish. Chopard uses Lucent Steel, a recycled alloy roughly 50 percent harder than 316L.

Titanium comes in grades. Grade 2 is commercially pure and soft, around 150 to 200 Vickers. Grade 5 is alloyed with aluminum and vanadium and runs 330 to 350 Vickers. Grade 23 is a purer version of Grade 5 with the same hardness. Panerai and Blancpain use Grade 5 or Grade 23 on their titanium models. Grand Seiko uses a proprietary high-intensity titanium rated around 30 percent harder than 316L. Check the grade before buying. It determines most of what follows.

Scratches: Major Differences

Grade 2 titanium scratches more easily than 316L. Grade 5 Titanium is much more scratch resistant because of the alloy mixture. 

Hardness determines scratch resistance. Grade 5 titanium at 330 to 350 Vickers is harder than 316L, 904L, and Lucent Steel, all of which sit between 150 and 230. A Grade 5 titanium case takes fewer scratches than any standard steel case under the same use. Grade 2 titanium is roughly equal to 316L.

Scratches also look different on titanium. The metal forms an oxide layer on contact with air that darkens the surface. Fresh scratches show bright, then dull to match the surrounding metal within weeks. Steel scratches stay bright until polished. A titanium watch with a year of wear usually looks cleaner than a steel one with the same use.

Refinishing: Titanium is Harder to Refinish

Steel refinishes easily. Brushed and polished surfaces come back to factory condition at any competent watchmaker.

Titanium is harder to refinish. Brushed finishes restore well. Polished titanium is difficult to bring back and often goes to the manufacturer. Matte and bead-blasted finishes, which most titanium watches use, hide this problem. A polished titanium watch will show its age sooner than a brushed one.

Corrosion and Skin Affect

Titanium does not corrode. Sea water, sweat, and chlorine have no effect. It also contains no nickel, so it is the choice for anyone with a nickel allergy. 316L contains nickel and can cause a reaction in sensitive wearers. 904L contains more nickel than 316L, not less.

Steel can pit after years of salt exposure without rinsing. 904L resists this better than 316L. Neither is a concern with basic care.

Feel: Titanium Feels "Better"

Titanium conducts heat poorly, so it warms to skin temperature in seconds and never feels cold. Steel stays cool longer. Titanium has a grey tone that reads darker than steel. Some buyers like it, some think it looks dull. It is not a defect.

Price and resale

Titanium costs more to machine, and brands charge for it. A titanium reference usually carries a premium over the steel equivalent. On the pre-owned market, steel is the more liquid metal. It sells faster and to a wider audience. Titanium holds value well on references where it is the standard material, such as the Panerai Submersible and Blancpain Fifty Fathoms, and less well where it was offered as an option alongside steel.

What Does this Mean to you?

At the end of the day, it is all preference. If you like a watch, the case material should not stop you from choosing that specific one. However, it helps to know the differences so you can choose something that fits your needs better. 

If you are looking for a certain watch, we can help. Get in touch with us today for more information.