  Amorphous solids are known to fail catastrophically via fracture, wherein
cavitation at nano-metric scales is known to play a significant role.
Micro-alloying via inclusions is often used as a means to increase the fracture
toughness of amorphous solids. Modeling such inclusions as randomly pinned
particles that move only affinely and do not participate in plastic relaxation,
we study how the pinning influences the process of cavitation-driven fracture
in an amorphous solid. Using extensive numerical simulations and probing in the
athermal quasistatic limit, we show that just by pinning a very small fraction
of particles, the tensile strength is increased and also the cavitation is
delayed. Further, the cavitation that is expected to be spatially heterogeneous
becomes spatially homogeneous by forming a large number of small cavities
instead of a dominant cavity.
