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In order to maximize resource utilization as well as providing trust management in grid, we propose a novel framework - Trust-Incentive Resource Management (TIM). Having child model, club model, bid model and trust model, TIM dynamically manages grid resource by integrating values of prices, trust, and incentive. In this mechanism, providers set the price according to demand and supply, and consumers maximize the surplus upon budget and deadline. A weighted voting scheme is also proposed to secure the grid system by declining the join request from malicious nodes. A TIM prototype has been successfully implemented in a real grid system, CROWN grid. We evaluate the proposed approach through comprehensive experiments and achieve improved results in resource allocation efficiency, system completion time, and aggregated resource utilization.