The aim is to open the sphere. A simple-looking, yet highly challenging take-apart puzzle.
 Difficulty: 9/10
 Machined from solid brass, Titan measures 50mm in diameter, and weighs 515g.
 The brass is left unfinished, leaving it to slowly patinate and darken with use.
 If you're stuck on a puzzle, email info@felixure.com and ask for a clue.