Tungsten micro-lattices are produced by direct ink writing of a slurry of WO3-0.5% NiO submicron powders, followed by H2 reduction and Ni-activated sintering. The green bodies undergo isotropic linear shrinkage of ~50% during the thermal treatments resulting in microlattices, with overall ~50% open porosity, consisting 95-100% dense tungsten struts ~100 µm in diameter. Ball-milling of the powders and inks reduces the sintering temperature needed to achieve full densification from 1400 to 1200 °C and enables the ink to be extruded through a 200 µm nozzle. Full sintering densification is achieved through the addition of 0.5 wt% NiO to the slurry, which was also beneficial for the following infiltration with liquid copper. Partially-sintered struts with submicron open porosity were also infiltrated with Cu, resulting in a co-continuous W/Cu composites with wide W struts/Cu channel at the lattice scale, and fine W/Cu interpenetrating skeletons at the strut scale. The project currently investigates possible mechanical advantages of using a gyroid structure instead of a lattice structure. The continuous geometry might be able to eliminate stress concentration and hence making the structure tougher, especially at lower temperatures where the material is brittle.I was born and grew up in Switzerland and am studying materials science at the ETH in Zürich. Being fascinated by the possibilities additive manufacturing offers I decided that I’d like to explore the field and contribute to expand the possibilities. Hence I focused on this related topics during my studies.