Aluminum foams produced by powder metallurgy usually exhibit typical inhomogeneities regarding their pore size distribution. The realized pore sizes range from a few tenths of a millimeter to several centimeters. Discontinuous cell structures lead to discontinuous properties and make the predictability of metal foam-based components difficult. This deficiency subsequently ensures that many applications with high reliability and predictability requirements remain closed to the material. Accordingly, influencing the cellular structure of metallic foams is a popular target of relevant work. Our approach aims to influence the precursor material so that initially, many microscopic pores are formed instead of a few larger ones. The challenge lies firstly in producing starting material with finely distributed blowing agent components and secondly in adapting the foaming process to the new conditions. We want to shed light on both focal points in equal measure within this contribution. We integrated a high-energy ball milling process into the powder metallurgical process line to produce a homogeneous fine-scaled precursor material. Based on microstructure investigations of milled powders and extruded semi-finished products, we discuss the influence of the milling process on the blowing agent component TiH₂ and its distribution. A typical follow-up effect of TiH₂ comminution is the shift of dehydrogenation to lower temperatures, demonstrated by DSC. Furthermore, foaming tests with typical Al foam alloys as well as with alloys with a melting interval adapted to the modified dehydrogenation are presented and discussed.