“…Due to the large amount of interfaces between the matrix and nanoscale dispersion, the dispersion-strengthen W based alloys such as W-V [12], W-K [13], W-La 2 O 3 [14], and W-TiC [15] have higher radiation tolerance than that of the pure W. The multilayer nanofilms (such as Cu/W [16], ZrO 2 /W [17], and Cr/W [18]) deposited by magnetron sputtering showed an excellent radiation tolerance owing to the introduction of interfaces. Encouragingly, the researchers have demonstrated this idea using the bulk nanocomposites through accumulative roll bonding (ARB) [19,20]. However, when the number of absorbed or annihilated defects exceeds their own sink strengths, the corresponding sink capacities will disappear and even lead to cracking due to excessive accumulation of defects.…”