POROUS COMPOSITIONS OF A POLY(ARYLENE SULFIDE) POLYMER AND A PARTICULATE HEAT RESISTANT MATERIAL WHICH ARE SUITABLE FOR FORMING INTO BEARINGS OR OTHER ARTICLES OF MANUFACTURE ARE PREPARED BY (A) FORMING A SLURRY OF A POLY(ARYLENE SULFIDE) POLYMER HAVING A PARTICLE SIZE OF 1 TO 3500 MICRONS WITH A PARTICULATE HEAT RESISTANT COMPOUND SUCH AS ASBESTOS HAVING A PARTICLE SIZE OF 1 TO 3500 MICRONS IN A VOLATILIZABLE LIQUID, (B) COMPRESSING THE RESULTING SLURRY SO AS TO FORM AN INTEGRAL MOLDED COMPOSITION HAVING FROM 0.1 TO 70 WEIGHT PERCENT RESIDUAL VOLATILIZABLE LIQUID THEREIN, (C) HEATING THE RESULTING COMPOSITION AT A FIRST TEMPERATURE IN THE RANGE OF 0*C. TO 230*C. SO AS TO SUBSTANTIALLY VOLATILIZE THE RESIDUAL LIQUID THEREIN, (D) THEREAFTER ADDITIONALLY HEATING THE RESULTING COMPOSITION AT A SECOND TEMPERATURE IN THE RANGE OF 250 TO 500*C., AND (E) THEREAFTER RECOVERING THE RESULTING POROUS, FILLED POLY (ARYLENE SULFIDE) COMPOSITION AS A PRODUCT OF THE PROCESS.