Polypropylene (PP) filaments are prepared by blending two different molecular weight components of PP. A melt-spinning process to produce filaments includes mixing of components, extrusion, and two-stage drawing, followed by a unique Gradient Drawing (TM) process. Blending results in highly deformable as-spun filaments with high draw ratios. For 90:10 blends of PP samples with melt flow indexes of 35 and 3, a high level of crystallinity and crystalline and amorphous orientations are obtained. A sonic modulus of 28 GPa, dynamic modulus of 20 GPa, tensile modulus of 16 GPa, and tenacity of 667 MPa are achieved. These samples are dimensionally stable up to similar to 100 degrees C. All steps in the production of the filaments are continuous. (c) 2005 Wiley Periodicals, Inc.