New Delhi, Nov. 20 -- Did you know the latest Apple Watch Ultra and Series 11 aren't just cut or stamped from titanium and that they're built up, grain by grain, in a 3D printer? It appears that Apple is quietly rewriting its approach to manufacturing by incorporating 3D printing, right down to the frame that sits on your wrist.

There's no conveyor belt forging happening here. For each case, the process starts with ultra-fine titanium powder that's reportedly sourced from recycling, not newly mined ore. That detail matters when you're making millions of premium devices every year for sustainability and for controlling costs in a market that watches every gram. Each particle is a mere 50 microns across and is refined to keep oxygen low. T...