The promise of less expensive prototyping
3D metal printing currently works by melting and fusing together powdered steel or titanium. This method eliminates the need to make a mold or a new mold should the part need changes. So 3D printing reduces the cost and time of making the metal part (though the 3D printer itself and the ingredients are costly).
A growing demand
But there's still a growing market. "According to consulting firm Wohlers Associates, the worldwide market for 3D printing in 2014 rose to $4.1 billion, and sales of additive manufacturing machines for metals printing grew by 76 percent," says Zaleski,