The truth is that titanium is so expensive that it doesn't make any sense to use it as a raw material for grinders.
Titanium alloys are used in surgical appliances and in aerospace applications, mostly… there are also used in the motorsports industry where strength and weight are crucial.
You can also buy titanium grinders by visiting at https://capu.de/.
Shaping Titanium is very expensive as the raw material has high resistance, it takes more time and more tools to create the shape as you would from an aluminum block.
Still, you can do a little google search, and you will find a few titanium grinders, such as the one at the top of the article which is clearly not made from Titanium alloy.
But there are so expensive it makes no sense to own one unless you are just in love with grinders or that money is not a problem and you can afford a good couple of hundreds of dollars to spend on one. when you do get one we think that this one is an OK design.
There are many vendors out there that offer Titanium grinders, most of them are online shops and affiliated pages and forums… and you can say OK, they did not know.