Self-curing epoxy thermoset resins have been focused considerable attention by industrialist because of their superior mechanical strength, good resistance to moisture and chemical process, high bonding strength and low shrinkage during curing. In the present improbable environment, the hemp plant fibres/epoxy incorporated composites are serving better than traditional materials in order to low price, high strength, low density, sustainability, low abrasive wear and corrosion resistance. The important objectives of this experimental work are to develop the chemically treated and untreated hemp/glass fibre-reinforced composite materials and investigate the mechanical strengths like tensile strength, flexural strength and impact strengths of prepared samples as per ASTM standard. It has been observed that the chemically treated hemp/glass fibre-reinforced samples exhibited maximum flexural strengths, and these materials are recommended for automobile sectors as alternative material by replacing synthetic fibre incorporated composite materials. The interfacial behaviour, internal constituents, fibre failure mode, fibre pullout, voids and delamination of fractured area are studied by conducting morphological studies with aid of scanning electron microscopy.