A process for producing articles with an extrusion-based additive manufacturing system using a consumable filament made from or containing a propylene polymer composition made from or containing:



A) from 20% to 60% by weight of a heterophasic propylene copolymer;
B) from 5% to 33% by weight of a propylene homopolymer or copolymer, wherein the copolymer contains up to 5% by weight of an alpha olefin;
C) from 2% to 15% by weight of an elastomeric block copolymer made from or containing styrene;
D) from 4% to 32% by weight of an elastomeric ethylene copolymer;
E) from 5% to 50% by weight of a glass material as filler; and
F) from 0.1% to 5% by weight of compatibilizer.