https://techcrunch.com/2019/08/17/next-apple-watch-could-include-new-ceramic-and-titanium-models/

Apple’s next Apple Watch revision could include new materials for the case, including titanium and ceramic. That’s according to new assets pulled form the latest watchOS beta release, as uncovered by Brazilian site iHelp.br (via 9to5Mac). The new screens discovered in the beta show graphics used to pair the Apple Watch during setup, and list “Titanium Case” and “Ceramic Case” alongside model size identification info.

Apple has previously offered a ceramic Apple Watch, alongside its Series 2 and Series 3 models, with a premium price and white and black case options. The company hasn’t previously used titanium, but the lightweight, durable metal is popular among traditional watchmakers because it can really significantly reduce the heft of a watch case, while still providing a premium look and feel.