Good idea.
The Navigation skills are worthwhile training as some of the Capital skills (like Jump Drive Operation, Jump Drive Calibration & Jump Fuel conservation) depend on Navigation & Warp Drive Operation.
TBH I don't think it's worth skilling for a titan. The smaller Cap ships (Carrier and to a lesser extent the Dread) are more more usuable and deployable. The carrier is a pretty good ship and can be used in many ways - it has a longer "reach" due to the base jump range of the ship (measured in ly) and is cheaper. Essentially Dreads are for sieges of POS's, other dreads and Player Owned Staions.
The idea of this thread is two-fold - it gives people a longer term goal and due to the business that we are working towards (capital ship production) it gives the corp better product range. Our marketing of the ships we make has more options if we can deliver/move the produced ship to other systems. We currently cover the Caldari Capital Ships (Carrier, Dread & Mothership), the Rorqual (Capital Industrial), Orca and probably the Rhea (JF). Being able to cover the other racial ships - especially the Gallente (Thanatos, Moros & Nyx) would be good.