Metal 3D printing is reshaping how manufacturers design, prototype, and produce parts at scale. What began as a tool for one-off prototypes has become a production-ready technology used across aerospace, automotive, healthcare, and industrial manufacturing. The global metal 3D printing market reached an estimated $11 billion in 2026 and is growing at roughly 24 percent annually—driven by the demand for lighter, stronger, and more complex components that traditional manufacturing methods struggle to produce efficiently.
How does metal 3D printing work?
Metal 3D printing, like all additive manufacturing, builds objects layer by layer from a digital model rather than cutting material away from a solid block. However, the specific processes used for metal are more complex than those for consumer plastic printers. Here are the primary methods.
Selective Laser Melting (SLM) and Direct Metal Laser Sintering (DMLS) use a high-powered laser to selectively melt or fuse fine metal powder particles together, one thin layer at a time. The build chamber is filled with inert gas (typically argon) to minimize oxidation. After each layer is fused, a fresh layer of powder is spread across the build platform and the process repeats until the part is complete. These methods produce highly dense, strong parts and are widely used in aerospace and medical applications.
Electron Beam Melting (EBM) uses an electron beam instead of a laser to fuse metal powder in a vacuum environment. EBM is particularly suited for reactive metals like titanium and produces parts with excellent mechanical properties for aerospace and orthopedic implant applications.
Binder Jetting takes a different approach. Instead of melting powder with a laser, it selectively deposits a liquid binding agent onto a bed of metal powder. The bound layers build up into a "green" part, which is then removed from the powder bed, decaked, and sintered in a furnace to achieve full density and strength. Binder jetting excels at high-volume production because it can print many parts simultaneously across the full build area.
After printing, metal parts typically require post-processing—sintering, heat treatment, support removal, and surface finishing such as sandblasting or polishing—to achieve final mechanical properties and visual quality.
Why use a metal 3D printer for production?
Metal 3D printing offers several fundamental advantages over traditional casting, machining, and metal injection molding.
Complex geometries in a single step. Designs that would require multiple castings, welding, or assembly of separate pieces can be produced as a single consolidated part. Internal channels, lattice structures, and organic shapes that are impossible to machine conventionally can be printed directly.
Lighter, stronger parts. Topology optimization and lattice structures allow engineers to place material only where it is structurally needed, reducing weight by up to 60 percent compared to traditionally manufactured equivalents. In aerospace, lighter components translate directly into fuel savings and reduced emissions.
Less material waste. Traditional subtractive machining of aerospace metal parts can require cutting away up to 90 percent of the original material. While most scrap metal is recycled, reprocessing still consumes significant energy. Additive manufacturing deposits only the material needed, and unused powder can typically be reclaimed and reused.
On-demand spare parts. Instead of maintaining large physical inventories of replacement components, manufacturers can store digital files and print parts when and where they are needed. This is already transforming maintenance, repair, and overhaul (MRO) operations in aviation and automotive sectors. HP has partnered with Würth Additive Group to integrate digital inventory management directly into logistics networks, enabling on-demand spare parts production worldwide.
Faster development cycles. Prototyping and iterating metal parts takes days instead of weeks, accelerating the path from design to production.
HP Metal Jet: industrial metal 3D printing at scale
HP's Metal Jet S100 Printing Solution is an industrial-grade binder jetting system designed for high-volume production of metal parts. The system uses HP's proprietary binding agent and inkjet technology to print across the full build area simultaneously—working layer by layer rather than point by point—which gives it a significant speed advantage over laser-based systems for batch production.
The Metal Jet S100 features a build volume of 430 × 309 × 170 mm and 4-times nozzle redundancy at 1200 dpi resolution, producing parts with fine detail and consistent mechanical properties. After printing, parts are decaked and sintered to full density.
In 2026, HP expanded the Metal Jet materials portfolio significantly, qualifying three new materials: copper for thermal management and electrification applications, M247LC nickel-based superalloy for high-temperature aerospace components, and tungsten carbide-cobalt for cutting tools and wear-resistant tooling. These join the platform's existing stainless steel and tool steel capabilities, including collaborations with Indo-MIM and Sandvik for M2 Tool Steel and 316L stainless steel.
HP also introduced a collaboration with Volkmann GmbH for the vPort, a semi-automated powder handling system for depowdering, powder recovery, and refilling—lowering the operational barrier for organizations adopting metal binder jetting.
Unused metal powder from the Metal Jet process can be reclaimed and reused, reducing material cost and waste. This high reusability is a core advantage of HP's binder jetting approach and aligns with the sustainability goals that increasingly drive manufacturing decisions.
How metal 3D printing is used across industries
Aerospace and defense. Lighter structural components, engine parts, and brackets reduce fuel consumption and emissions. SpaceX uses metal additive manufacturing for its Raptor engine components. The U.S. Department of Defense has invested millions in advancing metal AM for hypersonic and launch systems.
Automotive. Companies like John Deere use HP Metal Jet technology for cost-effective production parts and design innovation. Digital spare-parts libraries are replacing physical inventories, shortening repair times and reducing logistics costs.
Healthcare. Patient-specific titanium implants, surgical instruments, and dental prosthetics are produced using metal 3D printing. The healthcare segment of the metal AM market is expanding at over 20 percent annually as FDA guidance for 3D-printed implants becomes clearer.
Industrial manufacturing. Conformal cooling channels in injection mold tooling, custom jigs and fixtures, and low-volume production runs of complex components all benefit from metal 3D printing's design freedom and speed.
What's next for metal 3D printing?
The metal additive manufacturing market is projected to grow from roughly $15 billion in 2026 to over $47 billion by 2034. Several trends are driving this trajectory.
Materials are expanding rapidly—from stainless steels and titanium alloys to copper, nickel superalloys, and tungsten carbide. Software is becoming more integrated, with partnerships between HP and companies like Autodesk, Altair, and Materialise streamlining the design-to-print workflow. And as systems like the HP Metal Jet S100 continue to lower the cost per part for batch production, metal 3D printing is moving from prototyping into true serial manufacturing.
For organizations exploring how metal additive manufacturing fits into their operations, HP's 3D Professional Services team provides support from initial evaluation through production optimization, and HP 3D-as-a-Service (3DaaS) offers a pay-per-use model that reduces the upfront investment required to adopt industrial metal printing.
The ability to produce complex, lightweight, high-strength metal parts on demand—with less waste, shorter lead times, and growing material options—positions metal 3D printing as a defining technology for the next era of industrial production.
About the Author
Sean Whaley is a contributing writer for HP® Tech Takes. Sean is a content creation specialist based in San Diego, California. He has a wide breadth of knowledge when it comes to computer hardware, programming, and PC gaming.
