arjun tank is which is one of the most advanced tank,comparable to western tank,does face some problems such as over weight,engine problems,fire control system are there any solutions for this if please recommend.my personal view is that tank weight can reduced by using composite material or using titanium(i know titanium is costly)but india has 1/6 of world titanium.it can reduce the cost by mass production.engine can made as wankel engine and fcs can be computer controlled and with auto load it will be more lighter or the most possible system is developing a active protection system. please tell best possible solution.