Dynamic shock compaction using an 80-min diameter single-stage gas gun at impact velocities of 6004000 m/s, is used to fabricate bulk nanocomposite Pr2Fe14B/alpha-Fe magnets with exchange-coupled hard/soft phases, as well as bulk nanocrystalline thermoelectric half-Heusler TiNiSnSb alloys. Compacts Pr2Fe14B/alpha-Fe nanocomposite powders (synthesized by melt spinning) showed retention of alpha-Fe grain size of less than or equal to 25 run, which ensured exchange coupling between the hard and soft phases. Magnetic measurements revealed an energy product of similar to13.9 MGOe. Shock consolidated compacts of TiNiSn0.95Sb0.05 alloy with grain size of 20-30 rim were also produced and shown to exhibit reduction in total thermal conductivity to about 5.5 W/m-K and a lattice conductivity of about 3.5 W/m-K at room temperature.,hi this paper, the unique attributes of shock densification for forming and retaining nanocrystalline structure, and therefore leading to significantly improved magnetic and thermoelectric properties will be described.