Preheat your oven to 425°F (220°C) and line a roasting pan with parchment paper.
Pat the tri-tip roast dry with paper towels to ensure a good sear.
In a small bowl, combine 0.5 tbsp olive oil, minced garlic, rosemary, thyme, 0.5 tsp sea salt, and black pepper to create a paste.
Rub the garlic-herb paste evenly over all sides of the tri-tip.
Place the roast in the prepared pan and cook for 25 to 30 minutes, or until the internal temperature reaches 130°F for medium-rare.
While the beef roasts, toss the asparagus spears with the remaining 0.5 tbsp olive oil and 0.25 tsp sea salt on a separate baking sheet.
Add the asparagus to the oven during the last 12 minutes of the beef's cooking time.
Remove the tri-tip from the oven and transfer to a cutting board; tent loosely with foil and let rest for 10 minutes.
Slice the tri-tip thinly against the grain and serve alongside the roasted asparagus.