A process for making an article comprising the steps of: a) providing a build powder mixture comprising a first material powder in an amount of between 50 and 95 volume percent and a second material powder, the first material powder having one selected from the group consisting of a melting temperature, a melting temperature range, and a decomposition temperature, and the second material powder having one selected from the group consisting of a melting temperature and a melting temperature range, wherein the melting temperature or the melting temperature range of the second material powder is less than the melting temperature, the melting temperature range, or the dissociation temperature of the first material powder; b) three-dimensionally printing the article from the build powder mixture by spreading a layer of the build powder mixture, selectively jet-printing a fluid onto the layer to cause selected portions of the layer to bind together, and repeating the sequence of spreading and selectively jet-printing until the article has been constructed; and c) heating the printed article to a preselected temperature, the preselected temperature being above the melting temperature or within or above the melting temperature range of the second build powder material and below the melting temperature, the melting temperature range, or the dissociation temperature of the first material powder; and d) maintaining the printed article at the preselected temperature until the second material powder has infiltrated through the spaces between individual particles of the first material powder so that the article has a relative density at room temperature of at least 85 % as measured using Archimedes method, wherein the amount of dissolution of the first material powder in the second material powder at the preselected temperature is insufficient to reduce the diameter of a particle of the first material powder which had a starting diameter of the mean diameter of the first material powder by more than 25 percent, wherein the first material powder is a metal or a metal alloy or a ceramic, and wherein the second material powder is a metal or a metal alloy. a) providing a build powder mixture comprising a first material powder in an amount of between 50 and 95 volume percent and a second material powder, the first material powder having one selected from the group consisting of a melting temperature, a melting temperature range, and a decomposition temperature, and the second material powder having one selected from the group consisting of a melting temperature and a melting temperature range, wherein the melting temperature or the melting temperature range of the second material powder is less than the melting temperature, the melting temperature range, or the dissociation temperature of the first material powder; b) three-dimensionally printing the article from the build powder mixture by spreading a layer of the build powder mixture, selectively jet-printing a fluid onto the layer to cause selected portions of the layer to bind together, and repeating the sequence of spreading and selectively jet-printing until the article has been constructed; and c) heating the printed article to a preselected temperature, the preselected temperature being above the melting temperature or within or above the melting temperature range of the second build powder material and below the melting temperature, the melting temperature range, or the dissociation temperature of the first material powder; and d) maintaining the printed article at the preselected temperature until the second material powder has infiltrated through the spaces between individual particles of the first material powder so that the article has a relative density at room temperature of at least 85 % as measured using Archimedes method, wherein the amount of dissolution of the first material powder in the second material powder at the preselected temperature is insufficient to reduce the diameter of a particle of the first material powder which had a starting diameter of the mean diameter of the first material powder by more than 25 percent, wherein the first material powder is a metal or a metal alloy or a ceramic, and wherein the second material powder is a metal or a metal alloy.