An experimental fatigue program was carried out on composite joints with titanium bolts. Single, double, and triple-row double lap joints were tested in cyclic loading with the stress ratio, R= -1. In order to study the development of fatigue damage in the joints bolt movement, relative displacement between composite plates, and strain gauge measurements were used. Fatigue tests have shown that the fatigue resistance of multi-row joints is better than that of single-row joints. Direct measurements of damage development showed a significant influence of reduction in the pre-stress in the bolts and fatigue degradation of the bolt holes on relative displacement between composite plates and bolt movement. There was a significant effect on the strain evolution from the bolts during fatigue loading.