In this study, Al6061-20B-xW (x: 0, 5, 10 and 15) composite powders were produced by mechanical alloying and formed into cylindrical specimens by uniaxial cold pressing and their microstructural, microhardness and radiation shielding properties were comprehensively analyzed. Structural properties were investigated using advanced characterization techniques such as X-ray diffraction, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. These analyses provided detailed data on the distribution and effect of W doping within the composite matrix. The addition of W increased the composite's density from 2.54 g/cm3 to 2.82 g/cm3 and its microhardness from 143.5 Hv to 232.1 Hv. Corrosion resistance improved with 5 % W addition but declined with 10 % and 15 % W additions. The composite's radiation shielding performance against neutron and gamma rays was calculated using the Monte Carlo N-Particle Transport simulation code. Calculations indicate that W doping increases the neutron macroscopic cross-section and contributes to the absorption of secondary gamma rays arising from the neutron-boron interaction. With the addition of W, the secondary gamma-ray intensity decreased from 5.71 x 10-6 to 5.48 x 10-6, while the gamma-ray linear attenuation coefficient increased from 0.216 cm- 1 to 0.265 cm- 1. This study demonstrated that the incorporation of W to the Al-B composite significantly enhances its shielding performance against both neutrons and the secondary gamma rays generated during neutron absorption.