Good question.. I wasn't sure myself as I don't own any..
A google search came up with this
" Care And Feeding
Your customers need to know that special care is required when cleaning titanium firearms. Regular cleaning and use of gun oil is recommended, but no abrasives should be used on titanium parts. Abrasives will ruin the titanium's protective surface layer and reduce cylinder life, due to excessive erosion when firing. Use of abrasives can also void the warranty."