CONFIG_ALPHA_TITAN is not available for thedefaultarchitecture x86.
Result is shown for architecture alpha

Titan

modulename: core_titan.ko

and/or

sys_titan.ko

and/or

err_ev6.ko

configname: CONFIG_ALPHA_TITAN

Alpha system type
└─>Titan
In linux kernel since version 2.6.12  
AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.

source code: