The Collaborative International Dictionary of English v.0.48:

Individualization \In`di*vid`u*al*i*za"tion\, n. [Cf. F.
   individualization.]
   The act of individualizing; the state of being
   individualized; individuation.
   [1913 Webster]

WordNet (r) 3.0 (2006):

individualization
    n 1: discriminating the individual from the generic group or
         species [syn: individualization, individualisation,
         individuation]