Hard-type　piezoceramics　are　key　materials　in　high-power　transducers　and　transformers.　Acceptor　doping　is　the　most　widely　used　piezoelectric　hardening　approach,　but　the　mobility　of　oxygen　vacancies　at　large　electric　fields　or　at　high　temperatures　inevitably　leads　to　the　deterioration　of　hardening　performance.　The　present　study　proposes　a　new　hardening　method　associated　with　intragranular　metal　particles　for　achieving　strong　pinning　of　ferroelectric　domain　walls.　Highly　effective　piezoelectric　hardening　via　intragranular　Ag　particles　in　Ba0.85Ca0.15Ti0.90Zr0.10O3　ceramic　is　realized,　where　the　mechanical　quality　factor　Q(m)　and　the　coercive　field　E-c　increase　by　170%　and　53%,　respectively.　The　Ba0.85Ca0.15Ti0.90Zr0.10O3/0.10Ag　sample　features　a　larger　high-power　mechanical　quality　factor　than　the　pure　Ba0.85Ca0.15Ti0.90Zr0.10O3.　Moreover,　the　piezoelectric　properties　(d(31)　and　k(31))　of　the　Ba0.85Ca0.15Ti0.90Zr0.10O3/0.10Ag　sample　show　exceptional　stability　with　the　increase　in　vibration　velocity.　This　composite　approach　of　introducing　metal　particles　can　be　considered　as　a　generic　hardening　method　and　can　be　extended　to　other　ferroelectric　systems.