 This research investigates the influence of several variables on the hornification process of sisal fibres through wetting and drying treatment, which increases fibre mechanical behaviour and reduces water absorption and dimensional variation. The results indicate that lower fibre water ratios and immersion times of three hours are effective in improving tensile strength and increasing stiffness in all studied cases. This article was authored by Sofia Mendes, Lycia Nunes-Hugin, Renata Daniel-DOS Santos and others.