Since the Chinese own nearly the entire world’s supply of rare earth minerals we better hope they don’t screw this one up.
My guess is the will release a fungible brass mixture via wire and laser sinter it with high heat.
As a machinist that makes high end aircraft parts I do not worry about 3D printing putting me out of work anytime soon.
Video - General Electric prints a 3D mini jet engine
Time to consider expanding your skills set.
Along those lines- if this is copper based- municipalities will need to put armed guards on their light poles
By the way, Lockheed had a 3D printer in the late 1970s that made aluminum parts.