At Leibniz University Hannover, researchers have quietly crossed a threshold in materials engineering — designing an aluminum alloy not merely to exist, but to transform on command. By tuning the chemistry of AlMg2Si1.2 so that its melting window aligns precisely with the gas-release moment of a blowing agent, they have made foam-making a matter of intention rather than chance. The deeper ambition is to feed this material, as wire, into additive manufacturing systems capable of building components that are dense where strength is needed and porous where lightness or energy absorption matters —