It brings to mind satellites assembling themselves in space. Send up a tightly packed box of spaghetti and extrude it into the desired physical shape upon arrival in orbit. For increased rigidity, paint with a solar pumped laser to weld the links together.

> For increased rigidity, paint with a solar pumped laser to weld the links together.

Or unseal purified metal surfaces, press them together, and use vacuum diffusion welding.

With enough time and/or sunlight, it can happen on its own.