Hope below link paper will give you idea about your question

Characterization of loose powder sintered porous titanium and

Ti6Al4V alloy.

Ziya ESEN, Elif TARHAN BOR, Şakir BOR,TurkishJ.Eng.Env.Sci.33 (2009) , 207 – 219.c TUBITAK

doi:10.3906/muh-0906-41.

Sintering Kinetics of Titanium and Titanium Alloy Powders.

M.M. Gasik, A. Keski-Honkola, Y. Bilotsky

Аnswer: The effort for sinerovane of powders depends on the chemical composition of the sintered alloy, the particle size of the powder, the area of siterovane scheme and the conditions of compression.

Often the purpose of sintering is to obtain a particular alloy guaranteed technological and mechanical properties. In the preparation of such materials and to ensure the contents of the chemical composition.

The smaller the grains are dust particles greater compression force will be needed. Naturally influence on the density and will have the speed of compression. With increasing speed titanium become strong and resists more.

1- vacuum level: 

In vacuum sintering allows for the removal of excess gas remaining atoms in the crystal lattice at ambient conditions. To ensure such conditions necessary pressure 10E-4 bar

2- time of sintering

At high speeds titanium and become strong resist more and more. For at ambient conditions (24 ° C) will require a lower speed to 0,1 mm / min achieved by hydraulic presses

3- temperature

With increasing temperature ductility increases, but start the process of oxidation leading to difficult assembly of individual particles. Therefore, by increasing the temperature to 1400 ° C is necessary to the process is carried out in vacuum.

4- others ....

There are many other factors influencing the force necessary for sintering of titanium as: frequency of titanium particle size and particle shape, the state of delivery, downtime after the last treatment and others.

For Ti powders you will need a very good vaccum to ensure it doesn't oxidize as Ti is used as an oxygen getter. As Emil suggests 10-4 bar can be enough but I'd suggest even better vaccum5.10-5 or 10-5 bar.

For the temperature and time, you can make dilatometry on green compacts to find out the best suitable parameters for you powder.

Is there any software by which we can simulate sintering process for Titanium powder?