Explosive Ordnance Disposal: Clear all the remote bombs in the Gravity Boot sphere.
Super Lombax: Kill 25 enemies in a row without getting hit.
Be A Cool Skyboarder: Win a Skyboarding race without using boost.
When you land your ship, jump down the edge to a small area covered in rocks. There is a small path leading to the Titanium bolt.
Right before entering the factory, go to the left, around pillar and grab the bolt.
When you get into that room where there is a floating ball of those red robots, look up, and there will be your bolt. The hard thing is getting there without driving yourself crazy. At the entrance there will be a gravity ramp on the right side of the wall. It will lead you straight up there.