For the material illustrated, the volume fraction of the ductile matrix is large enough that it can take the increased load without failing. The composite continues to deform along the matrix ...

At the UTS deformation becomes localized in the neck region and the cross-sectional area of the sample in that region continues to decrease until ductile fracture occurs. The deformation in the neck ...

In brittle materials the ultimate tensile strength is close to the yield point, whereas in ductile materials the ultimate tensile strength can be higher. The ultimate tensile strength is usually found ...