In this Section the adhesion (blister) test is discussed in Sects. 8.1 and 8.2 regarding the performances of two types of nanotextured vascular self-healing materials and their effects on the adhesion and cohesion energies. In Sect. 8.3, double-cantilever beam and bending tests, applied for the mechanical characterization of self-healing materials, are discussed. Section 8.4 outlines the interfacial toughening by means of nanofibers (NFs) intended to prevent delamination and crack propagation. In addition, damage to interfacial layers toughened by NFs is characterized by impact testing. Sect. 8.5 provides comprehensive data on mechanical recovery in self-healing vascular materials. In addition to the essentially two-dimensional self-healing materials discussed in Sects. 7.1, 7.2, 7.3 and 7.4 and 8.1, 8.2, 8.3, 8.4 and 8.5, the mechanical behaviors of their three-dimensional counterparts are explored in Sect. 8.6.