This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. To break or become broken into fragments.

v. break or cause to break into pieces

"A nanosecond later a small charge would explode, thus releasing the tungsten rod within, which being heavier and harder, would fly into the crew compartment, shatter and fragmentize, quickly wounding, disabling, or simply slaughtering the human beings and any delicate electronic equipment inside."

fragmentized    fragmentizing   

break    separate    come apart    split up    fall apart   

crunch    comminute    bray    crush    atomise