This literary book provides a concise overview of the diverse array of natural fibres that are presently accessible, as well as the remarkable qualities that define each one. In addition, it provides an overview of the processes involved in the development of fiber-reinforced composites and the therapies that can be applied to the fibers in order to improve their properties. Furthermore, this book explains the process for extracting fibers from the husk of areca nuts, treating those fibers with ecologically friendly media, and turning those treated fibers into an epoxy polymer composite material. Mechanical, Tribological, Structural, Thermal and Elemental investigations in epoxy-based composites reinforced with alkali-treated chopped areca nut fibers with different fiber weight percentages have been compared in this novel work. From the study, it is concluded that the composition with 20 wt% areca nut fiber-reinforced epoxy polymer composites exhibits better properties.