Effects of annealing on bending properties of composites reinforced with pl
ain glass woven fabrics that were treated with different concentrations of
silane coupling agent were investigated in this paper. Bending strength inc
reased by annealing in the specimen treated with lower silane concentration
. Higher annealing temperature in a range from 80 degreesC to 150 degreesC
led to higher bending strength. Then, the fracture mode changed from a micr
o-crack type (low strength type) to a branched matrix crack type thigh stre
ngth type) by annealing.