In the process for preparing filled agglomerated granules of non-melt-fabricablegranular tetrafluoroethylene polymer in which the filler is a particulate metal-containing filler present in an amount of between about 5 and 40% by volume of the total volume, by agitating a finely-divided blend of said polymer and said filler in whichthe particle size of the finely-divided tetrafluoroethylene polymer