  We study thermalization, hydrodynamization, and chemical equilibration in
out-of-equilibrium Quark-Gluon Plasma starting from various initial conditions
using QCD effective kinetic theory, valid at weak coupling. In non-expanding
systems gauge bosons rapidly lose information of the initial state and achieve
kinetic equilibrium among themselves, while fermions approach the equilibrium
distribution only at later time. In systems undergoing rapid longitudinal
expansion, both gluons and quarks are kept away from equilibrium by the
expansion, but the evolution is well described by fluid dynamics even before
local thermal equilibrium is reached. For realistic couplings we determine the
ordering between the separate hydrodynamization, chemical equilibration and
thermalization time scales to be
$\tau_\text{hydro}<\tau_\text{chem}<\tau_\text{therm}$.
