Natal Saturn is the sign where your Saturn was placed during birth time, and from there other houses are calculated clock-wise.
If you were born with Saturn in Libra, then your natal house is Libra (Thula Rasi) and during transit, MARS forming conjunction (in Libra), sextile (aspect of 60° which are Leo and Scorpio in this case), square (aspect of 90° which are Capricorn and Cancer here), trine (aspect of 120° which are Gemini and Aquarius here), opposition (aspect of 180° which is Sagittarius here) are discussed in this article.
Conjunction is transiting through same sign as in birth chart, sextile is transiting 3rd or 11th house, trine is transiting 5th or 9th house, opposition is transiting 7th house from natal sign.
Generally, Mars conjunct Saturn leads to accidents, injuries, blood related diseases, liver and digestive system ailments.
Transit MARS conjunct Natal Saturn : You will develop inharmony, bitter feelings towards others.
Lot of physical work involved in every undertaking. You may have to face frustrations and taking risk can lead to failure.
People involved in corporate business, industries, government administration, military, police will require disciplined and organized approach.
Malefic Mars can bring treachery, jealousy or ill-treatment even after putting in hard work.
Control revengeful temper to avoid legal issues.
Transit MARS Sextile Natal Saturn : Planning, diligence, patience, sustained efforts can help you achieve goals.
Early results are not seen, but there is no need to be disappointed.
People in arts, crafts, engineering, science, technology and construction business can have favorable results during this transit.
Best results for people doing intricate works that require detailing.
Transit MARS Square Natal Saturn : Irritations, frustrations, inhibitions characterize this transit.
You will be subjected to heavy work and responsibilities. Extra effort and time are required to finish the task(s) in hand.
There will be professional problems, frustrations with authorities, old people and government agencies.
Rather than circumstances, your own inadequacies can cause blockages in endeavours.
Fear and apprehension can prove you inefficient. Physical injuries or exhaustion possible at work.
Diseases like skin rashses, inflammations, bruises, boils, broken bones due to falling, teeth problems can arise.
Transit MARS Trine Natal Saturn : You need to exercise patient use of energy and practical approach.
Your initiation, organizational abilities, hard work, discipline in business and professional affairs lead to success.
Good time for people in administration, management, architecture, engineering, machinery, constructions.
Those in authority can extend their support towards you.
During this transit, Mars energy is released by Saturn at a very controlled and steady pace, which delivers concentration and persistence.
Transit MARS Opposition Natal Saturn : Unnecessary tensions, irritations, excessive physical work can bring you down during this transit.
Avoid conflicts with elders and authorities. else your projects can get hampered frequently due to negligence and non cooperation.
Also avoid all legal issues and psychological battles.
Your views are not considered for any decision making and you will be forced to take back seat or cutoff from others.
Develop analytical thinking and maintain positive outlook.