In the present study, we reported a powder processing technique for fabricating a heterogeneous AlSi10Mg matrix reinforced by CNTs with enhanced comprehensive mechanical properties. The as-designed composite with 2 wt.% CNT exhibited excellent compressive yield strength of 211 MPa, which was 384% higher than that of the as-received AlSi10Mg (44 MPa), and similar ultimate strain (31.5%) to that of the matrix (32.5%). It was found that the combination of low-energy wet-milling and high-energy dry-milling as well as addition of the as-received matrix powders/CNTs in the dry-milling stage resulted in non-homogeneous dispersion of CNTs in the matrix, facilitating the development of heterogeneous architecture, and finally giving rise to high strength and acceptable ductility. The applied strategy shed light on the development of strong and ductile composites with different metallic matrices and reinforcements

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