The secret to cranking out a furniture-sized metal frame in minutes is Liquid Metal Printing (LMP), demonstrated by researchers at the Massachusetts Institute of Technology. They’ve demonstrated printing aluminum frames for tables and chairs, which are perfectly solid and able to withstand post-processing like drilling and milling.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/02/17/metal-3d-printing-gets-really-fast-and-really-ugly/