White ware ceramic bodies are commonly prepared using triaxial composition.
The word triaxial means that three major raw materials are used.
The three main triaxial materials are:
\[
\text{Clay},
\]
\[
\text{Quartz},
\]
and
\[
\text{Feldspar}.
\]
Clay provides plasticity and helps in shaping.
Quartz acts mainly as a filler and controls shrinkage.
Feldspar acts as a flux and helps in vitrification during firing.
Titania:
\[
TiO_2
\]
is not one of the three basic triaxial raw materials of white ware.
Therefore, the material which is not a triaxial material in white ware is:
\[
\text{Titania}.
\]