One of the strongest light metals that we know of which has the characteristic of being non-magnetic. Difficult to extract as the metal making it a limited resource to only very specific applications where you want something to be fairly light and strong.

Fun fact : White paint is made with titanium oxide (TiO₂).

And sunscreen too.

Fenrick said:
I'm more interested in the SR-71

DId you know that at the time of the manufacture of the Blackbird; the USSR was the only country that has the titanium the US needed to build it?

SO, under a top secret CIA program, the US was able to purchase the titanium (through a third party) to make the planes...

Also, the windshield of the SR-71 is not glas or plexiglass - it's made of Quartz, as the temperature on the windscreems would reach up to 600 degrees.

Fenrick said:
I'm more interested in the SR-71

The SR-71's engines are tilted downwards by several degrees in relation to the fuselage and wings. When in flight, the engines travel parallel to the flight path while the airframe, which is now tilted slightly upwards, provides the lift. This allows more of the engine thrust to contribute to pushing the aircraft forward, improving efficiency.

When on the ground, the SR-71's fuel tank is not completely sealed and leaks fuel. The aircraft is only given enough fuel to take off, where it rendezvous with a fuel tanker to get the rest of the fuel it needs. By the time it reaches cruising speed, the heat from air friction causes the fuel tank to expand, sealing it.

Without the cones in the engine intakes, the SR-71 wouldn't be able to fly at such high speeds. The cones cause a small, disrupted shockwave, slowing down the air entering the intake to subsonic levels, and causes excess air to spill over the engine nacelles. Without this, the sheer pressure from all that high speed air would destroy the engines.

Reading the comments above I realized e621 is the best place to learn some new cool facts.