The titanium Apple Card looks shiny, but you need to be careful when handling it. Company
Carrying a card this way can leave stains on it that are “impossible to wash off.” That's right - you can end up with a terrible-looking credit card just by sticking it in your wallet or jeans pocket.
Apple also does not recommend putting the Apple Card closewith other credit cards or things that could scratch an expensive titanium coating. But if someone still manages to stain the card, then it must be cleaned with a microfiber cloth soaked in isopropyl alcohol.
And although the Apple Card is unlikely to be used as often as Apple Pay when shopping, it is quite difficult to show your status and luxury, while having a dirty card.
Source:Apple