What if titanium gradually replaces aluminium within a few years?

In despite of its cost, some 140.000 metric tons of titanium are sold over the world every year.

A reduction of its price by a factor of, say, 10 would considerably increase its potential usages in the automotive and aircraft manufacturing industries (without speaking of all its other possible usages).; in return, its production and availability would further increase also.

This would represent new challenges but also new opportunities for the foundries that presently are casting aluminium. These founders might well be compelled to learn some new tricks...

*The main technical problem with titanium is that it must be smelted and cast under vacuum (or inert atmosphere, which necessitates serious investments).

Do you see the possible equivalence (for titanium et al) with what happened with aluminium at the end of the 19th century? Do you remember the upheaval that caused the Hall-Héroult process as well for the price as for the availability of aluminium. Do you remember what that implied over the years in the ease of manufacturing novel products, cars, aircrafts and so on. Remember also what this all implied in energy savings.

All this could happen again, thanks to lower prices for titanium (but also for tantalum, tungsten, vanadium et al). And the process that could be used for the production of these metals is much more ecological than Hall-Héroult's.