The natural wind flow is an increasingly important source of power production worldwide, with wind energy providing more than half of the growth in renewable energy. However, the efficient utilization of wind energy strongly depends on the structural condition of the turbine blade. Therefore, evaluating turbine performance in varying wind conditions is crucial for developing and designing energy-efficient wind turbines. Developing and designing large wind turbines and determining their performance under varying wind loads is a challenging and costly process. Numerical simulations using Finite Element (FE) modeling provide a cost-effective substitute to develop and test the performance of large wind turbines. However, studies pertinent to coupling of turbine blade at minimum cost and estimation of fatigue life under varying wind conditions are limited. This study aims to compare the strength and deformation of blades of a horizontal axis wind turbine made of composite and aluminum alloy. The aerodynamic analysis of a Horizontal Axis Wind Turbine (HAWT) is performed, with a 3D geometric model generated and imported into a Finite Element code (ANSYS Workbench) for analysis. The Computational Fluid Dynamic (CFD) analysis is coupled with structural analysis using one-way fluid structure interaction. The power output and pressure coefficients obtained from CFD are compared with experimental data. The deformation and stresses produced in the two types of blades (aluminum alloy and composite) are analyzed and compared, and the tip deflection and stress on the blades are related to wind speed and Yaw angles. The results obtained from numerical simulations demonstrate higher blade tip deformation in aluminum blades compared to composite material. The obtained results are compared and discussed in the context of similar studies available in the published literature. This study can help in the development of cost effective and high-performance wind turbines for efficient utilization of wind energy.