This thesis investigates the impact of yarn and fabric structure on the mechanical recyclability of textile structures. It focuses on variations in yarn twist and form (single or plied) as well as fabric type (woven or knitted) and their respective constructions. The study involved evaluating the mechanical recyclability of 21 cotton textile structures in different constructions, including woven and knitted fabrics, each made using one of the four yarns prepared for this study. The mechanical recyclability was evaluated based on the opening efficiency of the textile structures, together with the average mean fiber length and short fiber content post-tearing. According to the evaluation, a higher fraction of fibers sorted as open and longer fibers resulting from tearing indicated higher recyclability. Based on the evaluation, it was observed that the single yarns tended to be more favorable for mechanical recycling compared to plied yarns. In addition, the effect of the yarn plying twist was multifaceted, with lower yarn twists not necessarily benefiting recyclability. Testing was also conducted to characterize the yarn and fabric structures concerning properties such as count, strength, yarn twist, and thread density of the fabrics. It could be seen that it is of higher relevance to categories of fabric structures based on their density than their fabric type (weaved or knitted) in terms of recyclability. The denser fabric structures' recyclability was more dependent on their fabric construction, whereas, in less dense fabric structures, the yarn structure appeared to have a greater impact. Therefore, determining the interaction of the yarn and fabric structures is important to understand how variations in yarn and fabric structures impact the recyclability of textile structures.