The first picture shows an optimal position in the bench vice for removing an ear stem

Grab the ear stem close to the hinge (the titanium alloy is probably strong enough not to buckle, but you don't want to find out) and give it a good push against the spring to alleviate any load from the screw. Don't be shy - if any frame, this one can take some abuse.

When your pushing force balances the spring inside the frame, the T6 Torx screw is free of load and can be removed.

The ear stems come with two sunk metal washers each that make it easy to re-install them compared to other X-Metals that come with four thin, flimsy plastic washers per ear stem