[Material] Add Titanium alloy to materials (#8636)

* Add Titanium alloy

src/Mod/Material/StandardMaterial/Ti-6Al-4V.FCMat

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+; Ti-6Al-4V
+; vlk
+; information about the content of such cards can be found on the wiki:
+; https://www.freecadweb.org/wiki/Material
+; file created by FreeCAD 0.20.29603 (Git)
+
+[General]
+Name = Ti-6Al-4V (Grade 5)
+Father = Metal
+KindOfMaterial = Titanium
+MaterialNumber = 3.7165
+
+[Mechanical]
+Density = 4430 kg/m^3
+PoissonRatio = 0.330
+ShearModulus = 44 GPa
+UltimateTensileStrength = 975.5 MPa
+YieldStrength = 910 MPa
+YoungsModulus = 114 GPa
+Hardness = 35 HRC
+
+[Thermal]
+SpecificHeat = 553.0 J/kg/K
+ThermalConductivity = 6.7 W/m/K
+ThermalExpansionCoefficient = 8.6 µm/m/K
+
+[Electromagnetic]
+ElectricalConductivity = 580012.8 S/m
+RelativePermeability = 1.00005